1 hp, 12,000 RPM, Rear Exhaust, 3/8″-24 Spindle Thread. Type 1 Wheel Grinder, for cleaning metal, grinding and smoothing weld seams, removing imperfections before painting. 4″ Diameter, Straight Line, 1 hp, 12,000 RPM. Accepts optional 4″ diameter Type 1 Wheel, with 3/8″ center hole (maximum wheel width of 1/4″). Governor-controlled motor maintains RPM under heavy load; rear exhaust. Safety-lock lever is included on all models. SPECIFICATIONS Air Consumption (SCFM) 38.0 Power (hp) 1.0 Max. RPM 12,000 Tool Spindle Thread 3/8″ – 24 Male Air Inlet Thread 3/8″ NPT Exhaust Type Rear GL_Country Of Origin US Hose I.D. in. (mm) 3/8″ Vacuum Type Non-Vacuum Height in. (mm) 4.5 Length in. (mm) 8.625 Weight lb. (kg) 3.11 Width in. (mm) 6.5 Pkg. Height in. (mm) 4.5 Pkg. Length in. (mm) 10 Pkg. Weight lb. (kg) 3.79 Pkg. Width in. (mm) 6.25 CE Certified Yes EAN (UPC) 0616026523739 EAC Certified Yes Tool Style Straight Line