SP Tools Inc, a division of SP Air Corporation, introduces the 1/4" Heavy Duty Straight Die Grinder, No. SP-7220. This die grinder features an ergonomically-designed cushion-grip handle, rear exhaust, a built-in power regulator, safety throttle lever and a direct drive motor with graduated trigger. This tool provdies a free speed of 20,000 RPM, is 6-7/8" and weighs 1.37 lbs.