Low weight composite design weighs only 1.8 lbs.Self locking sanding arm allows for fast and easy belt changesQuick release locking lever allows for simple 360 degree sanding arm adjustmentsSmooth variable speed trigger for added user controlBuilt in air regulator for speed adjustmentsRec. Hose Size (in.): 3/8Air Inlet (in.) NPT/BSP: 1/4"18,000 RPM0.6 HP Motor provides non-stall operation