Features: 2-stage speed shifting vortex gearbox with quick-stop system Boron Stel Blades Center Point Triable Blade Metal Reinforced Handle System 25:1 Transmission with Heat Treated Gears High Output Gasoline Powered Engine Powder Coated Paint to Ease Ice Buildup Plastic cover for fuel tank Optional Extension for Ice Thicker Than 1M 65CC 3.4kw Gas Engine Drill size:6in /8in /10in Drill length:100cm packing size:41*40*30cm 6in drill:102*16*16cm 8in drill:102*21*21cm 10in drill:102*26*26cm