Air Locker DG004 16Pcs 1/4-Inch Mini Straight Air Die Grinder Kit with 10 most frequently used grinding stones is perfect for grinding, polishing, de-burring and smoothing sharp edges, engraving, and general shaping of parts. This small and lightweight grinder permits easy access to tight areas. The one-hand operation body makes it easy to operate. The paddle throttle lever provides smooth control with less hand fatigue. Built-in silencing reduces noise level, and the rear air exhaust helps blow exhaust away from work surface. The inlet has a screened filter to keep out unwanted particles. With its double ball bearing construction, this die grinder is very heavy duty and reliable.