Using the linear valve (Variable control valves) allows centering of the tool much easier to find the center - Side support handle for good control - Grip reverse valve enables one handed directional changes 1/2 HP air motor with double reduction gear system produces reliable power - Ideal for drilling, screw, driving, reaming, cylinder honing Side support handle for good control Reversing Made in Japan Strong and durable body Chuck Size 1/2 inch Chuck Size (in) / 1/2 Spindle Size (mm) / 3/8x24UNF Net Weight (kg) / 1.6 Overall Length (mm) / 220 Free Speed (rpm) / 500 Air Cons Free (m3/min) / 0.47 Air Inlet (PT) / 1/4 Hose Size (in) / 1/4