.4 hp, 3,200 RPM, 3/16" (5 mm) Dia. Orbit. Built-in speed regulator, extended rear exhaust muffler, safety-lock lever included. Governor-controlled motor maintains speed under load. Sample 9-micron micro-finishing film discs are included. Optional 54585 Side Handle Assembly available. 54028 Random Orbital Sanding Head accepts sanding pads with 1/4"-20 female thread. Includes 1-1/4" dia. medium density pad (54018), which has 1/4"-20 female thread and mounts to sanding head. SPECIFICATIONS Air Consumption (SCFM) 26.0 Power (hp) 0.4 Max. RPM 3,200 Pad Face Vinyl Sanding Head Spindle Thread 1/4-20 Male Tool Spindle Thread 1/4"-28 Female For Sanding-Head Spindle Exhaust Type Rear GL_Country Of Origin US Hose I.D. in. (mm) 1/4" Vacuum Type Non-Vacuum Motor Type Rotary Vane Height in. (mm) 3.0 Length in. (mm) 12.4 Weight lb. (kg) 1.9 Width in. (mm) 5.5 Pkg. Height in. (mm) 2.5 Pkg. Length in. (mm) 16 Pkg. Weight lb. (kg) 2.9 Pkg. Width in. (mm) 5.5 CE Certified Yes EAN (UPC) 0616026494008 EAC Certified Yes Tool Style Right Angle