We also sell out Advantage Zirconia Flap Discs individually. They are a great value for the price. These 4 1/2 inch diameter fit small angle grinders. The zirconia flap wheel is 1/2" thick with resin coated paper backing. The 7/8" arbor hole has a durable metal outer layer and is standard for 4 1/2 inch grinders. Advantage zirconia flap wheels are ISO 9001 certified and have a 13,300 maximum RPM. 40 grit is a coarse grit for grinding and sanding of steel.
