If you're looking for powerful performance, the 302B and 308B die grinders are your best bet. With a right angle configuration and a compact, straight option, you'll be able to easily reach tight workspaces with ease. Ingersoll-Rand Air Die Grinder Kit, Kit Tool/Kit, Type, Collet Capacity, in 1/4, Speed, RPM 25000, 0.33, Air Flow Rate HP, cfm 7 to 28, 90 Air, Air Inlet psi, in 1/4, Rear Exhaust Location, Throttle Style, 3/8 Minimum Hose Size, Housing Material in, Straight, Sound Level, 6.85 in L