Features:* .* The disc pad is made of polyurethane and the shank is made of stainless steel.* Suitable for most kinds of rotary tools, such as grinding machines, pneumatic grinders, electric drills, etc.* The maximum working speed is 12000 rpm and qualified for long service life.* Widely used in various surface polishing and cleaning, such as metal derusting, polishing glass and ceramics, marble, polishing car and wooden floors, etc. Specifications:* Material: Polyurethane* Color: Black, Red* Size: 4 inch/100mm* Thread: M10Package Contents:1 x Sanding Shoe1 x M10 Drill AdapterNotes:1. The actual colors 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.