WALTER Surface Technologies - 40 Grit, 4-1/2" Disc Diam, 5/8-11 Center Hole, Zirconia Alumina Flap Disc - 13,300 Max RPM, Plastic Backing, Arbor Attaching System, Coated

Coated abrasives can be used for most applications, from grinding to polishing. They consist of a thin layer of abrasive adhered to fiber, paper, cloth or rubber. Coated discs are normally used on angle grinders.

More durable than aluminum oxide, zirconia-alumina is best for medium- to heavy-material removal. The material grains constantly fracture to produce new sharp edges. Commonly used on carbon steels, aerospace alloys, nickel alloys, aluminum, cast iron, forgings and some stainless steels

Arbors require adapting nuts. They eliminates cross threading.