Features:The grinding tool is made of premium stainless steel, sturdy, high strength, anti-rust and durable, with 10 different types for grinding different parts of guitar.The grinding stone and sponge are good for rubbing the bridge pin, nut, etc, which can make the surface smooth and clean the dust away.The grinding gasket is ultra slim and good for grinding the fret. The pins are made of quality ABS, sturdy and durable.Good accessories for guitar lovers for regular maintenance.Specification:Material: Stainless Steel & ABS & Foam & StoneGrinding Tool Size: 14 x 0.3cm / 5.51 x 1.18inchGrinding Stone: Approx. 98 x 12 x 12mm / 3.85 x 0.47 x 0.47inchGrinding Sponge: Approx. 100 x 70 x 25mm / 3.93 x 2.75 x 0.98inchGrinding Gasket: Approx. 78 x 22mm / 3.07 x 0.87inch; 13 x 1mm / 0.51 x 0.04inchString Nut: Approx. 32 x 8 x 8mm / 1.26 x 0.31 x 0.31inchString Nut Range: Max. 5mm / 0.2inchWeight: Approx. 182gPackage List:1 x Grinding Tool Set (10pcs)1 x Grinding Stone2 x Grinding Gaskets1 x Grinding Sponge6 x PinsNote:Due to the difference between different monitors, the picture may not reflect the actual color of the item.Due to manual measurement, there may be 1-2mm error in size.