Chicago pneumatic Needle Scaler CP7125 (SSKD)Benefits Great for rust removal on chassis Great cleaning up steel wheel drums Ideal for surface clean up work Features General purpose needle scaler Rubber sleeve on handle for better comfort Delivered with 2 sets of needles: 19 x 1 8" (3 mm) for standard usage 29 x 5 64 " (2 mm) for finer usage Part number 8941071250 Model CP7125 Power (Joules) 5 joule Blows per minute 4000 Bore 1" 21 mm Stroke 1. 3" 33. 5 mm Needle capacity 19 x 1 8 (3) Net weight