Neiko 30078A Pneumatic Air Needle Gun Scaler, 4600 BPM | 19 Hardened Steel Needles | 1/4" NPT Air Inlet, 90 PSI Pneumatic powered paddle lever needlegun scaler with 19 high tension steel needles that strike at 4600 BPM with a 1-1/8" piston stroke Fine chisel needles automatically adjust themselves to contours, curves and irregular surfaces, cleaning them to bare metal in seconds Needle scaler attachment uses a bayonet mechanism to securely lock in without the need of a tool and uses a standard 1/4" NPT air inlet Versatile usages in metalwork, home repair, welding, automotive repair, shipboard preservation, deburring, cleaning off parts, tools, equipment and more Removes paint, mill scale, loose scale, weld flux, rust, scale, slag, splatter paint, cement and other residues from metal surfaces