Astro Pneumatic's 219 ONYX 3pc Die Grinder Kit includes the 1/4-Inch 90-Degree Angle Die Grinder, 1/4-Inch Mini Die Grinder and an 8pc. Double Cut Carbide Rotary Burr Set. Features of this set includes a lever throttle for feathering control, a rib textured handle which provides a firm grip and a rear exhaust air flow system that directs air away from work surface. Additionally the increased motor size provides more power to make completion of work that much easier.