Chicago Pneumatic CP7120 - 1/8 Inch X19 Air Needle Scaler & 1.37 Inch (35 mm) Chipping Hammer, Stroke 1.12 in / 28.4 mm, Bore Diameter 0.98 in / 25 mm - 4800 Blow Per Minute 8941071200Convertible needles scaler chisel hammer For operators working in general maintenance or in body shops applications such as rust removal, surface clean up or wheel drum clean up who look for a convertible needles scaler chisel hammer, CP7120 series is what you need. Designed for general maintenance or body shops applications such as rust removal, surface clean up or wheel drum clean up, the CP7120 series offers high versatility with its convertability