Diablo's premium 4-1/2 in. x 0.040 in. x 7/8 in. Metal Cut-Off Type 1 Disc provides premium performance and increases productivity. Diablo's Thin Kerf design provides for a thin cut, allowing your power tool to work at its full potential. Unlike other bonded discs on the market, this disc is a true 0.40 in. design. This disc is designed for use in angle grinders and is ideal for all types of metal/stainless steel materials.