The JobSmart 13-Piece Spindle Lock Hobby Air Die Grinder Kit is a versatile and powerful air tool set designed for rotary action. With a maximum working pressure of 90 psi and a wattage of 800 watts, this air grinder set includes various wheel types such as Zirconium Corundum, Non-Woven Scouring Pad, and Wool Grinder Discs for different grinding tasks. The set includes 13 pieces in total, with a polished color finish and made of durable aluminum material. Perfect for hobbyists and professionals, this air grinder kit is a reliable and efficient tool for your workshop needs.