Insulated handles actually FLEX under load to help absorb stress! Centrifugal clutch assemblies slip upon overload or sudden contact with rocks and other buried obstructions. Powerful 2-person digger is built TOUGH to deliver top performance for your most productive crews! Ergonomic handles have twist grip throttle control. They're fiberglass-reinforced to absorb vibration and to help insulate if auger should contact an underground power cable. Dependable 135cc Honda 5 HP engine powers up on regular or unleaded gas. Low Tone muffler. Spur gear reduction transmission is fully enclosed and oil lubricated. Maximum drilling torque 190 ft.-lbs. Rotates clockwise. 1 3/8in. (35mm) hex connection for augers which are sold separately.