●Easy to mount/replacement with the shaft.●Cup type brush which is easy to operate due to compact and high speed rotation, excellent in usability.●Since it is cup type, it is optimum for bottom/curved surface corner grinding.●Optimum for polishing flat and side surfaces.●Working Tool: Variable speed type electric micro grinder.●Wire Diameter (mm):0.20●Bristle Material:Nylon●Outer Diameter x Bristle Length x Shaft Length x Shaft Diameter (mm):13 x 8 x 40 x 3●Max Working Rotation Speed (rpm):10000●Comments:Finishing, Polishing, Cleaning●Shaft: Free-Cutting Steel