The guitar tremolo arm is made of high-quality metal materials, and the surface is chrome-plated to make the guitar tremolo arm look more shiny and beautiful, and it is durable and can be used for a long time.The tremolo bar is approximately 17cm/6.69inch in length and has a thread size of 6mm/0.24inch in diameter, perfect for 6mm diameter threadsthe tremolo bar vibrates at high frequencies to change the pitch and adjust the tension of the strings for a better vibrato effect, making your music more attractive and a pointtremolo bar set includes, 2 silver tremolo bars (with white tips), 2 black tremolo bars (with black tips), enough for your The use of the tremolo bar is very simple, you only need to rotate the tremolo bar to install it in the threaded hole of the 6MM tremolo arm of the guitar, please make sure that the diameter of the threaded hole is 6MMColour:black+silverMaterial:MetalPackage Contents:4 x guitar whammy barOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.