Feature: *The grinding head is made of nylon fiber, abrasive grit and special adhesive. *6mm shank fit a most of power drill and grinder. *Good heat dissipation, avoid burning workpiece during processing. *Mainly used for polishing, deburring, cleaning, rust removal and surface texture treatment of various materials such as metal, wood and plastic. Specification: *Material: nylon fiber *Color: Gray *Diameter: 20/25/30/40/50mm *Shank diameter: approx. 6mm / 1/4inch *Thickness: about 25mm (Different sizes, thickness may be different, please understand.) *Quantity: 1pc Package Included: 1*Grinding Head Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.