A guitar pick (American English) is a plectrum used for guitars. Picks are generally made of one uniform material, such as some kind of plastic (nylon, Delrin, celluloid), rubber, felt, tortoiseshell, wood, metal, glass, tagua, thermosetting plastic or stone. They are often shaped in an acute isosceles triangle with the two equal corners rounded and the third corner less rounded. They are used to strum chords or to sound individual notes on a guitar.

In British English, guitar picks are referred to as plectra, reserving the term pick to identify the difference between this and finger picks. ^{[citation needed]}

Musicians have used plectra to play stringed instruments for thousands of years.^[1] Feather quills were likely the first standardized plectra and became widely used until the late 19th century. At that point, the shift towards what became the superior plectrum material took place; the outer shell casing of an Atlantic hawksbill sea turtle, which would colloquially be referred to as tortoiseshell.^[1] Other alternatives had come and gone, but tortoiseshell provided the best combination of tonal sound and physical flexibility for plucking a taut string.^[2] Prior to the 1920s most guitar players used thumb and finger picks (used for the banjo or mandolin) when looking for something to play their guitar with, but with the rise of musician Nick Lucas, the use of a flat "plectrum style guitar pick" became popular.^[3]

There have been many innovations in the design of the guitar pick. Most of these were born out of the issue of guitar picks slipping and flying out of the hand of the player.^[4] In 1896, a Cincinnati man (Frederick Wahl) affixed two rubber disks to either side of a mandolin pick, which made it the first popular solution to the problem.^[5] Over the next two decades more innovations were made, such as corrugating the rounded surface of the pick or drilling a hole through the center to fit the pad of a player's thumb.^[6] A more notable improvement was attaching cork to the wide part of the pick, a solution first patented by Richard Carpenter and Thomas Towner of Oakland in 1917.^[6] Some of these new designs made picks undesirably expensive. Eventually, pickers realized that all they needed was something to sink their fingerprints into so the pick wouldn't slip, such as a high relief imprinted logo. Celluloid was a material on which this could easily be done.^[7]

Tony D'Andrea was one of the first people to use celluloid to produce and sell guitar picks. In 1902 he came upon a sidewalk sale offering some sheets of tortoise shell colored cellulose nitrate plastic and dies, and eventually he would discover that the small pieces of celluloid he punched out with the dies were ideal for picking stringed instruments.^[8] From the 1920s through the 1950s, D'Andrea Manufacturing would dominate the world's international pick market, providing to major businesses such as Gibson, Fender, and Martin.^[9] One of the main reasons celluloid was so popular as guitar pick material was that it very closely imitated the sound and flexibility of a tortoise shell guitar pick. The practice of using Hawksbill turtles for their shells would become illegal in 1973 as a provision of the Convention of International Trade in Endangered Species of Wild Fauna and Flora (CITES), forcing musicians to find something else to pick with.^[2]

Celluloid provided a good alternative in many ways. Tortoise shell was rare, expensive, and had a tendency to break. Celluloid was made from cellulose, one of the most abundant raw materials in the world, and nitrocellulose combined with camphor under heat and pressure produced celluloid. Though originally meant as a replacement for ivory billiard balls, celluloid began being used for many things for its flexibility, durability, and relative inexpensiveness, making it a natural candidate as a material for guitar picks.^[10] Later, other materials, such as nylon (and less commonly wood, glass, or metal) would become popular for making guitar picks for their increased grip, flexibility, or tonal qualities.^[11]

D'Andrea Picks was the first company to create custom pick imprinting in 1938, allowing customers to order imprinting up to 12 block letters. One of the first to make the player imprint popular was guitarist Nick Lucas in the early 1930s.^[12]

Playing guitar with a pick produces a bright sound compared to plucking with the fingertip. Picks also offer a greater contrast in tone across different plucking locations; for example, the difference in brightness between plucking close to the bridge and close to the neck is much greater when using a pick compared to a fingertip.^[13] Conversely, the many playing techniques that involve the fingers, such as those found in fingerstyle guitar, slapping, classical guitar, and flamenco guitar, can also yield an extremely broad variety of tones.

Most thicker guitar picks have so-called beveled edges. While many guitarists use pick slanting for fast solo riffs, this won't be needed when a pick has beveled edges. With pick slanting, the pick is turned clock- or counter-clock wise to let the guitar pick glide off of the string easier when using standard thinner flat picks. In fact, most beveled edges start at a pick thickness of 2.0mm and up. Beveled edges make it easier to play without turning the guitar pick in a certain position.^{[14][better source needed]}

Most common mass-manufactured picks are made out of various types of plastic. Most popular plastics include:

• Celluloid. Historically, this was the first plastic ever used to produce picks,^{[citation needed]} and it is still widely used today, especially for guitarists aiming for vintage tone. Celluloid picks generally have a tortoiseshell design.
• Nylon. A popular material, it has a smooth and slick surface, so most manufacturers add a high-friction coating to nylon picks to make them easier to grip. Nylon is flexible and can be produced in very thin sheets. Most thin and extra-thin picks are made out of nylon.^{[citation needed]} However, nylon loses its flexibility after 1–2 months of extensive use and eventually becomes fragile and breaks.^{[citation needed]} Introduced in 1961 Herco developed the first nylon guitar pick.^[15] It became the pick of choice for many professional guitarists of the 60's and 70's.^[16] Due to the unique composition of nylon it was described as a "radical new idea in guitar picks" by Fretts magazine.^[17] Notable users of this pick have included Ace Frehley,^[18] Joe Walsh,^[19] John Entwistle who used the Herco for the bass guitar,^[20] Jimmy Page preferred the Heavy Flex 75 variant,^[21] David Gilmour,^[22] and Tommy Bolin who favored the Herco Gold pick which he would customize by chewing on them which he said, "loosens them up and gives them a feeling somewhere between a heavy and medium thickness".^[23]
• Acetal. Acetal is a highly durable class of plastics. Delrin is DuPont's trademarked name for a type of acetal. Delrin is hard, glossy and durable, and can also be doped to produce a matte texture. The friction between a steel or nickel guitar string, and smooth, glossy acetal is very low. Glossy delrin picks literally glide across the string and therefore have a fast release, producing very little pick noise, while delivering a rounded tone emphasizing the lower order harmonics.^{[citation needed]} Matte finish acetal picks like the Clayton Acetal generate a bit more pick noise, and a more aggressive attack, but the additional friction of the matte surface helps the guitarist hold the pick more securely. Delrex is a variation of Tortex, which is by itself Delrin. It was invented to replace tortoiseshell since the trade of tortoiseshell was banned in 1973. Delrex is used as the material for Dunlop's "Gator" picks.
• Ultem. This plastic has one of the highest stiffness of all plastic picks. It produces a bright tone and is popular among mandolin players.
• Lexan. Glossy, glass-like, very hard, but lacking durability.^[24] Used for thick and extra-thick picks (> 1 mm). Usually has a high-friction grip coating.
• Acrylic. Tough, light, clear, seamless polymer with great resistance to impact and weathering. Acrylic is not brittle and does not yellow or crack. Can be molded and cut to almost any shape and thickness. It renders a very full spectrum tonal range when used as a plectrum on stringed instruments. Some grades of acrylic have a unique gripping characteristic, and when warmed to the touch, become tacky or sticky feeling, causing the material to cling to your fingers. Acrylic can be heat tempered for strength and longevity. V-Picks are the first noted company to make acrylic guitar picks, dating as early as 1980, and are the only guitar pick manufacturer that heat tempers acrylic picks.
• Polyamide-imide is a material often used in aerospace applications as replacement for metallic alloys. Picks made of this material have low friction on the strings and high durability.
• Kirinite is very similar in sound to Acrylic, but more durable. Many pick makers prefer it over Acrylic because of its resistance to friction and impact.
• Galalith picks excel at emulating the tone received from tortoiseshell, because they are both made of high percentage of keratine
• UHMW-PE (also often referred to as UHMW, or UHMWPE) is a shorter name for Ultra High Molecular Weight Polyethylene. This type of thermosetting plastic is characterized in warm tone and extreme durability.

Picks made from various metals produce a harmonically richer sound than plastic, and change the sound of the acoustic and electric guitar.^[25] Some metal picks are even made from coins, which give players a unique tone as the alloys used in various coinage from around the world vary greatly.^[26] Playing guitar with a silver pick gives a unique, rich and bright sound, very different from normal plectrums (Brian May of Queen often plays with a silver sixpence).^[27]

Plectrums crafted from natural animal byproduct are the oldest materials known due to their availability and durability,^[1] and are still regularly used by plectriers to craft guitar, bass and mandolin picks. The tonality produced by each type of natural animal material varies greatly, and is further enhanced by the thickness and shaping of each material.^[28]

Each guitar pick made of wood has its own unique properties and signature sound as a result of differences in density, hardness and cellular structure. Most wood picks produce a warmer tone than plastics or metals.^[29] To withstand the rigors of picking and strumming only the hardest woods on the Janka scale are used for picks—including hardwoods like African Blackwood, Bocote, Cocobolo, Lignum vitae, Rosewood, and Zebrawood. While the thick and sometimes rough edge of a wooden pick may create a fair amount of drag at first, wooden picks are generally easy to break in and may even do so quicker than plastic picks. After a couple of hundred strokes, the metal guitar strings wear down the edge and create a smoother pass over the strings.

Glass is relatively hard and heavy in comparison to metal or plastic and therefore produces a greater range of tone^[30] than these materials. Glass can be polished to a smooth or rough texture depending on the grit of sandpaper used. Likewise, factors such as size, shape, and weight have a much more dramatic effect on the overall tone making each individual glass pick sound and feel unique. Due to the specialized tools needed to process glass, there are very few plectriers using this material. Contrary to popular belief, due to their small size and high gauge, glass guitar picks tend to be very durable and more resistant to impact (such as falling) than most stone picks.

• Thermoset picks are extremely hard, but still a form of plastic. Picks made out of this material are thicker than usual. They start at 2.0mm and go up to 3.5mm in different shapes. ChickenPicks guitar picks are made out of Thermoset.
• Agate picks range in thickness from 1mm (very rare) up to 5mm, and are extremely inflexible. As they are harder than the metal guitar strings, they resonate the strings more completely.^{[citation needed][original research?]}
• Felt picks are mainly used with the ukulele.
• New Tortis is an alternative to natural tortoise,^{[citation needed]} made of polymerized animal protein. It is hard, smooth, thick, and has only slight tip flexibility.
• Tagua is a nut from South America grown on a Tagua Palm Tree. The material has similar properties to animal ivory so it's also known as Vegetable Ivory. Tagua produces a very smooth clear tone as the material slides off the strings easily. Tagua guitar picks are generally hand made.
• Carbon Fiber is also used by PickHeaven, Dunlop, Timber Tone Picks and RJL guitars to make guitar picks. These picks are extremely durable and have an extremely high stiffness-to-weight ratio. The world's thinnest guitar pick is made from carbon fiber and has a thickness of 0.2 mm.^[31]

Some picks have small protrusions to make them easier to keep hold if the fingers start to sweat, which is very common on stage due to the hot lights. Some picks have a high-friction coating to help the player hold on to them. The small perforations in the stainless steel pick serve the same function. Players often have spare picks attached to a microphone stand or slotted in the guitar's pickguard.

The equilateral pick can be easier for beginners to hold and use since each corner may be used as a playing edge.^[32][33]

The shark's fin pick can be used in two ways: normally, employing the blunt end; or the small perturbations can be raked across the strings producing a much fuller chord, or used to apply a "pick scrape" down the strings producing a very harsh, scratching noise.

The sharp edged pick is used to create an easier motion^{[citation needed]} of picking across the strings.

Some guitar pick shapes are patented. Usually those patents claim ornamental design.

Picks are usually gripped with two fingers—thumb and index—and are played with pointed end facing the strings. However, it's a matter of personal preference and many notable musicians use different grips. For example, Eddie Van Halen held the pick between his thumb and middle finger (leaving his first finger free for his tapping technique); James Hetfield, Jeff Hanneman and Steve Morse hold a pick using 3 fingers—thumb, middle and index; Pat Metheny and The Edge also hold their picks with three fingers but play using the rounded side of the plectrum rather than the pointed end. George Lynch also uses the rounded side of the pick. Stevie Ray Vaughan also played with the rounded edge of the pick, citing the fact that the edge allowed more string attack than the tip. His manic, aggressive picking style would wear through pickguards in short order, and wore a groove in his Fender Stratocaster, Number One, over his years of playing. Noted '80s session guitarist David Persons is known for using old credit cards, cut to the correct size and thickness and using them without a tip.^[34]

The motion of the pick against the string is also a personal choice. George Benson and Dave Mustaine, for example, hold the pick very stiffly between the thumb and index finger, locking the thumb joint and striking with the surface of the pick nearly parallel to the string, for a very positive, articulate, consistent tone.^{[citation needed]} Other guitarists have developed a technique known as circle picking, where the thumb joint is bent on the downstroke and straightened on the upstroke, causing the tip of the pick to move in a circular pattern, which can allow speed and fluidity. Many rock guitarists use a flourish (called a pick slide or pick scrape) that involves scraping the pick along the length of a round wound string (a round wound string is a string with a coil of round wire wrapped around the outside, used for the heaviest three or four strings on a guitar). The first use of the pick slide is attributed to Bo Diddley and can be heard in the opening of his song "Road Runner".

The two chief approaches to fast picking are alternate picking and economy picking. Alternate picking is when the player strictly alternates each stroke between downstrokes and upstrokes, regardless of changing strings. In economy picking, the player uses the most economical stroke on each note. For example, if the first note is on the fifth string, and the next note is on the fourth string, the guitarist uses a downstroke on the fifth string, and continue in the same direction to execute a downstroke on the fourth string. Some guitarists learn economy picking intuitively and find it an effort to use alternate picking.^{[citation needed]} Conversely, some guitarists^[who?] maintain that the down-up "twitch" motion of alternate picking lends itself to momentum, and hence trumps economy picking at high speeds.^{[citation needed]}

• Hoover, Will (November 1995). Picks!: The Colorful Saga of Vintage Celluloid Guitar Plectrums. Backbeat Books. ISBN 978-0-87930-377-8.

• Types of Guitar Picks- An extensive article about different materials, shapes, and gauges, and how they affect the sound of a pick.
• Guitar Pick Materials – An in-depth look at the various materials used to make plectrums.
• Guitar Plectrums – A brief article discussing the various aspects of guitar plectrums.
• Tuck Andress - Pick and Finger Techniques, Archived version of Pick and Finger Techniques by Tuck Andress