Size:100/115/125/150/180mm 4"/4.5"/5"/6"/7" For paint surface, wood, metal, 3C. Abrasive Diamond. Size 4.5"(115mm), 5"(125mm) Grit P80/P100/P120/P200/P400 Application For grinding titanium alloy, tungsten steel, stainless steel, stone, ceramics, glass, and various metals.