Covington has updated the Two-Station Expandable Drum Unit! Instead of the old style wherein the wheels were mounted directly to the motor shaft, this new unit has two drums mounted on a shaft that is pulley driven. This new model features sealed ball bearings and a 1/2hp motor! This unit still runs at 1725rpm, the perfect speed for expandable drums! The 8" Expandable Drum unit is an economical two-station grinder/polisher. This machine comes with two (2) 3" x 25-7/32" sand belts (100g & 220g), 1/2hp motor, instructions, and product guarantee.