Ingersoll Rand 125 Standard Duty Needle Scaler Adjustable bayonet-type needle housing lock allows adjustment without special tools Choice of three needle materials permits custom selection for various surfaces Rubber-faced throttle valve means positive sealing Tested and approved in accordance with mil-s-23492a (ships) Precision heat-treated needles for maximum performance For surface preparation work involving the cleaning or removal of paint, rust, dirt or weld slag, the 125 is a durable, dependable, economical solution 19 Needles Each needle 1/8-Inch (3.2 mm) 4600 Blows per minute at free speed