2 Pack Tuning Fork - Standard A 440 Hz Tuning Fork, Musical Instruments Violin Guitar Tuner DeviceSpecifications:Material: metal alloy madeMeasurements: Handle length: 38mm ; Fork length: 82mm ; Tuning fork diameter: 4.5mm ; Total length: 120mmPitch: this tuning fork resonates at 440 Hertz, or "A"Color: Silver Weight: approx 30gFeatures:Pitch A4. 440 Hz printed on the handle; A good and accurate tuning fork for a beginner guitar or violin playerPocket Size and Lightweight: good size to tuck into drawers, carry in a pocket etc; You can carry these around easily and effortlessly, very portable and handyValue Pack Set: comes with 2 pieces A 44O tuning forks in sliver color, very econimical and affordable, perfect for kids, students, or beginners useHOW TO TUNE A GUITAR USING A TUNING FORK1 Strike the fork against something firm, such as a tabletop or kneecap2 Hold it close to your ear or place the stem (or handle) with your thumb and 1st finger. - and not the tines (or fork prongs) - against something that resonates, such as a tabletop or even the top of the guitar.3 At the same time, play an A note (the open 5th string on your guitar) and tune it to the fork's tone.