Variable Speed. Produces swirl-free finish. Lightweight, low vibration composite design. Contoured grip. Specs: Air Consumption (CFM):16; CFM at Load: 15.5; Speed (RPM): 10,000; Air Inlet Size (NPT): 1/4" ; Min. Hose Size: 5/16". Includes:360 degree swivel vacuum adapter that provides greater range of movement without tangled hoses and cords.