Draper 65138 Storm Force Composite 10mm Reversible Air Drill With Keyless Chuck Low noise, low vibration reversible air drill with keyless chuck from the Storm Force range by Draper. The comfortable ergonomic handle and lightweight composite housing assist in the prevention of cold-sink on the user. Planetary gear system with needle bearings for ultimate performance Chuck size 3/8in Free speed 1800rpm Operating air pressure 90psi Average air consumption 114l/min Minimum hose size 3/8in I/D Air inlet 1/4in BSP Weight 920g Manufacturer's part 65138 Chuck diameter 10mm Free Speed 1800rpm Shape Pistol.