High Performance: This 1/4" air die grinder could provide no-load speed up to 20000 rpm. Operating pressure: 90 psi ; Air consumption: 85.5 L/min. And the rear exhaust design could direct air away from the work surface, improve work efficiency Easy to Use: This mini pneumatic angle grinder designed with the partially rubberized housing for comfortable grip. It only weighs 0.47 kg and adpoted 90° head, which is perfect for one-handed operation and can be used flexibly in many places Safety design: This 90° air angle grinder designed with the safety trigger mechanism, which is easy to control and could prevent accidental starting of the tool Wide Application: Equipped with 1 x 1/4" collet and 1 x 1/8" collet which can match a variety of accessories and deal with different surfaces flexibly. This air die grinder is perfect for grinding, deburring, polishing etc Package Contents: 1 x air die grinder; 1 x 1/4" collet; 1 x 1/8" collet; 1 x compressed air connection; 1 x 17 mm chuck key; 1 x 11.5 mm chuck key; 1 x oil bottle; 1 x collet nut., Weight: 1.4991433816 pounds, Manufacturer: Hangzhou Great Star Industrial Co.,LTD.