Package include 2pc×3 inch Nylon Cup brush red grit 80 Features 1.Max RPM: 12500.Used on Angle Grinder. 2.Maintains shape & will not rust, not shed bristles under normal conditions. 3.Safer to use, will not puncture skin.Safe to use than steel wire brushes. 4.Applications: Removing paints, corrosion, weld scale, surface rust & burns from metals.Can also be used for wood polishing and deburring NOTE:  1. For safety, remember to wear goggle or eye protection in case scrap are thrown from the brush as it spins.  2.You can test it on a small area first before applying it on a large area.  3.The dimensions are measured by hand and may have a little error. Please don't mind.