This workbench caster kit by SPACEKEEPER is made of metal and includes a detachable mounting plate. The casters are designed to lock upon proper handling and the lift pedal is ribbed and textured for extra grip. The quick release plates allow for easy lifting of the workbench. Compatible with workbenches, stands, tables, cabinets and lightweight machinery with flat bases. Features 1. The casters are designed to lock upon proper handling so that all heavy capacities stay in place. 2. An individual need only push their foot down on the pedal to lock a desk from rolling away on the jobs. 3. The wheels of each caster carry workbenches effortlessly, so you can spend more time getting your jobs done. 4. The retractable casters are equipped with quick release plates, work by simply pushing down on the pedals to raise your workbench off the floor. 5. Each lift pedal of the heavy duty retractable caster is ribbed and textured to provide extra grip when foot pressure is applied. The casters will work on workbenches, stands, tables, cabinets and lightweight machinery with flat bases. Specification Material: Metal Color: See Photo Package Includes: 1 x Retractable Caster Set