The AEROPRO ARP17314 is a professional grade 1/4" mini die grinder. This tool is great for high speed grinding, port smoothing, general polishing and deburring. Uses include all kinds of mold, metal products and handicrafts, the manufacturing of circuit boards, blank finishing, grind finishing and more. Features include powerful 22,000 rpm action, lightweight design, and easy to use. Recommended air pressure is 90 psi with average air consumption of 4.5 CFM. Tool weight is 1.19 lbs.