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 & Stone Grinding Tool Size: 14 x 0.3cm / 5.51 x 1.18inch Grinding Stone : Approx. 98 x 12 x 12mm / 3.85 x 0.47 x 0.47inch Grinding Sponge: Approx. 100 x 70 x 25mm / 3.93 x 2.75 x 0.98inch Grinding Gasket: Approx. 78 x 22mm / 3.07 x 0.87inch; 13 x 1mm / 0.51 x 0.04inch String Nut: Approx. 32 x 8 x 8mm / 1.26 x 0.31 x 0.31inch String Nut Range: Max. 5mm / 0.2inch Weight: Approx. 182g Package List: 1 x Grinding Tool Set (10pcs) 1 x Grinding Stone 2 x Grinding Gaskets 1 x Grinding Sponge 6 x Pins Note: 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.