Speed regulating governor maintains constant speed and torque control while grinding and prevents over-speed while free running Lightweight composite body Wheel guard adjusts to 9 different positions without tools Vibration absorbing handle allows longer user without operator fatigue Quiet operation. Grinder operates at 79 db Throttle lever features automatic lock for added safety Heavy duty ball bearing construction for vibration free performance Durable precision machined and hardened steel gears Grinding wheel not included