Earthquake Earth Auger 2 Person Powerhead, Honda Gcv160 5.5HP 4-Cycle Engine, Designed For The Big Jobs, Super Duty Unit Tackles A Wide Range Of Soils & Rips A Hole As Large 12 14" Diameter With Exceptional Control, Solid Steel, Heat Treated Alloy Gears, 3" Heavy Duty Centrifugal Clutch, Easy To Grip Fingertip Throttle Control, Sturdy 12 Gauge Steel Handlebar, Iso-Vibe Flex Coil Technology For Stabilizing Power, Prevents The User From Being Jerked Around By Rocks Or Hard Soil, Gear Ratio 30:1, Max RPM 121, Auger Diameters (ES) 2, 3, 4, 6, 8, 10, 12, 14.