FD Only Kendall Howard Performance Caster Kit is a great add on to our Performance Ser LAN Stations/Workbenches. No hardware or tools are required to install these lockable, swivel casters. They simply twist into the base of the table leg for a secure hold. These heavy duty bearing-driven casters have threaded shafts that replace the levelers and make installation easy. With a maximum load capacity of 1,000 lbs., you can add the LAN Station Caster Kit to any FD Only Performance Ser LAN Station/Workbench or 4-Post Open Frame Rack to make it mobile. When installed, the casters will add 4" in height.