Diameter : 4 In Arbor/Shank Size : 5/8-11 Bristle Material : Carbon Steel Bristle Diameter : 0.02 In Speed Rating : 8500 Rpm Applicable Materials : Brass, Copper, Iron, Steel Suitable For : High-Speed Air And Electric Tools, Both Portable And Stationary Machines
Diameter : 1 In Bristle Material : Carbon Steel Bristle Diameter : 0.02 In Bristle Trim Length : 7/8 In Speed Rating : 22,000 Rpm Grit Grade : Extra Coarse