●Capable of polishing the bottom surface and the side surface at the same time.●Attached to a rotating tool such as an automation machine or drill press for use.●For rust and dirt removal of various metals, cleaning before and after welding, and polishing of the bottom and inner diameter of cylinders.●Working tool: electric drill, drill press, etc.●Wire Diameter (mm):0.3●Bristle Material:Stainless Steel●Outer Diameter x Bristle Length x Shaft Length x Shaft Diameter (mm):30 x 25 x 35 x 6●Max Working Rotation Speed (rpm):3000●Shaft: Steel●Air tools cannot be used.●Please use below The maximum working rotation speed. Please wear protective equipment to use safely.