and high quality. Easy nut slotting and filing. Perfect for filing string slots into nuts. Widen and shape pin hole slots so they fit perfectly. As a guitar and luthier I use they all the time. 13 string size 1-13 With the shaft length it makes easier handling for filing string slots. Material: Stainless steel Color: Silver Each rod length : 2 1/2 inch Diameters: 0.14 inch - 0.61 inch as shown in the pictures Note: That these files are especially the smaller ones are thin metal can easily bend and need work slow for smoother slots. Care is recommended when using so that they will last you a good while. Use is for wood and bone, and soft metals such as brass, copper only. Not recommended for hard or ferrous metals. Package included: 1* Guitar Nut Slotting Bridge Pin Hole Slot File Kit Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.