COMPATIBILITY AND STRENGTH: 7″ wheel drastically increases cutting speed & reduces grinding time. Now with Flange attachment for FLUSH grinding & sanding. All HDII discs have a steel core & up to 50x more diamond embedded than competing cutting wheels! RECOMMENDED USE: Use with a 7” angle grinder at max 8,000 rpm. ⅝” arbor. Cut, Sand, Grind, & Sharpen with the same wheel. Works on almost any material from Masonry to Metal & PVC to Porcelain. Do not cut wood or glass. Not for use with Air Tools LIFETIME CUSTOMER SUPPORT: Our tools are so good we offer lifetime customer support. If you wear out or damage this wheel we will replace it, no questions asked! Just reach out to customer service on our website. SAFETY: More than anything,the Handi Disc II is designed to be safe. Made with steel, the HDII won’t shatter and explode like conventional fiberglass wheels even if it binds up. End of Spindle MUST be Even with Face of HDII. ABOUT BAD DOG TOOLS: Based in Rhode Island, we’ve been a family owned and operated company since 1988. Our high quality tools have earned their place among professionals in Construction, Agriculture, Aviation, Automobile, and more. The Next Generation Handi Disc. HDII cuts, sands and grinds a myriad of materials. Use with a hand held grinder on masonry, metal, plastic, stone and more. Use the 6” Flange HDII on an angle grinder. Unlike other brands, our HDII is made with a steel core, and the surface and edges are covered with over six carats of 46 grit diamond. Use on Steel, Aluminum, Granite, Porcelain, Concrete, plus soft materials like PVC and plastic without loading up the wheel. Cut Rebar in Concrete without trashing your metal blade on the concrete. Easily chase cracks in Asphalt. Even grind Abrasive Resistant (AR) Steel. More than anything,the Handi Disc II is designed to be safe. The steel core won’t shatter and explode like conventional fiberglass wheels even if it binds up.