MODEL DG - 56 Free Speed 56000 r.p.m. Collet Size 3 mm Overall Length 156 mm Air Inlet 1 / 4" Air Consumption 7.0 cfm Air Pressure 90 psi Air Hose 5 mm Net Weight 0.21 kg Suitable for grinding, sanding in hard to reach places. Intricate carvings, removal of scratches