Features: Pistol type scaler suitable for cleaning heavy paint and rust scale from metal surfaces. Removable needle head allows use as a standard air hammer but requires additional chisel set and spring retainer (not included). Features variable speed trigger control. Replacement needle sets available.Specifications: Model No: SA50 Stroke: 35mm Free Speed: 4800bpm Air Consumption: 7cfm Operating Pressure: 90psi Air Inlet Size: 1/4"BSP Weight: 2.1kg Noise Power/Pressure: 113/102dB(A) Vibration/Uncertainty: 11.6/1.64m/s� Replacement Needle Set (19pc): SA50.02 Optional Spring Retainer: SA11R/17 Optional Chisel Sets: AK50 (5pc), AK57 (7pc) Load Vibration: 11.6 Noise Power: 113 Noise Pressure: 102 Height: 217 Width: 263 Length: 69