Micro air grinders are instruments mainly used for hand-held operations. Designed to utilize the technology and related know-how gained from the related field of business, the micro die grinder is crafted be used for deburring, grinding, finishing at work sites of various industries that require precise and accurate work. This grinder is ideal for cleaning and polishing jewelery, porting of cylinder heads, dies or any hobby craft uses as well. High-speed pencil grinder, suitable for high-speed precision machining. The exquisite internal design makes it easy to use. Convenient hose with hose protector, extremely flexible hose and wear-resistant shield. 1/8" Collet, 1/4" air inlet. 22000 RPM free speed, 0.6Mpa air pressure. Suitable for grinding, polishing, cleaning jewelry, molds, rotors, back plates, brake pads, cylinder heads, mounting seats, etc.