Cut and Finish In One: A dual-grit structure provides end-to-end efficiency, 40-grit particles are used for rapid material removal, while 80-grit particles on the back are used for smooth grinding and finishing, the entire process from rough grinding to polishing can be completed without frequent wheel changes High-Performance Electroplated and Alloy Steel Core: Employing a heat-treated alloy steel core and a electroplated coating, it provides superior wear resistance and stability, uniformly distributed particles consistent cutting efficiency and extended lifespan across a variety of materials, including metal, stone, tile, and concrete Versatility Across Multiple Materials and Professional-Grade Performance: Designed for various substrates including metal, stainless steel, iron, aluminum, ceramic tile, stone, and concrete, supporting both dry and wet operation, its balanced structure and smooth operation an ideal choice for professional craftsmen and diy enthusiasts Only 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.