The R12 die grinder by JET is ergonomically designed for the comfort of the professional. Absorbent hand grips reduce vibration and minimize hand fatigue during operational use. The innovative and rugged ball bearing design heightens the durability of the die grinder. The R12 is a versatile grinder in that is has straight, angled and extended head designs. There is also a variable-speed throttle with a built in safety lock for extra convenience. For those grinder jobs that require real power, the JET R12 is thee tool.