These handy set of four wheels work great for use on workbenches and other machinery up to 500 lbs where mobility is important. The beaver wheel kit is used as acessories on our Beaver workbenches, ShapeFX router tables, Scorpion planer stands and Prodigy CNC stands. Simply step on the four levers to lift the machine/stand up off the floor and roll to where the machine/stand is needed. Once there simply lift up the four levers and drop the machine/stand back to stabilize on the shop floor.