Easy to mount/replacement with the shaft.End type brush which is easy to operate, since its compact and high-speed rotation and excellent usability.Since it is end type, it is optimum for polishing the bottom of fine parts/corner grooves.Working Tool: Variable speed type electric micro grinder.Wire Diameter (mm):0.25Bristle Material:Diamond Abrasive Grains Nylon #600Outer Diameter x Bristle Length x Shaft Length x Shaft Diameter (mm):8 x 12 x 36 x 3Max Working Rotation Speed (rpm):15000Comments:Polishing of metal/ceramic products, elimination of scaleShaft: Brass