Item Name: Slot Grinder Guitar Nut Files Set Luthier Repair Tool Slotting File Kits. Files Size: 0.4mm / 0.5mm / 0.6mm / 0.7mm / 0.75mm / 0.8mm / 0.9mm / 1.0mm / 1.05 mm / 1.1mm / 1.2mm / 1.4mm / 1.6 mmColor: Blue Box + Silver Files (As shown)Product size: approx. 7.5*2.8*1.3cmMaterial: Stainless steelItem: Guitar Nut Slotting File SetFeature:*100% brand new and high quality.*Suitable for kinds of guitar repairing needs.*Easy nut slotting and filing.*Perfect for filing string slots into nuts.*With the longer shaft length it makes them easier handling for filing string slots.*It can use for bone and plastic guitar bridge, can't use for metal guitar bridge.Package Includes:1 set String Saw Rods for Nut Slotting *Please make