Caster Sets Rated to 600 pounds. contains four swivel wheels. They are fast and easy to attach. You need only 3/4€ clearance to slide the casters under the stand in order to clamp them in place. A magnetic face holds the casters in position while you tighten the clamps, and all the casters lock to hold the machine in position. Which caster set to use is dependent on the type of machine and where its center of gravity is located.