50mm Swivel Caster with Adjustable Foot. Height can be Raised/Lowered via Hex NutSafe Working Load: 50Kg (Per Caster) Wheel Diameter: 50mm/1.97″ Weight: 37g. A compact- integrated design to ease adjustment after install. The castor and foot are built into the same part- allowing for fluid movement and height adjustments. Freely adjust the height of equipment by raising or lowering the hex nut with a wrench. Wheel castors operate to assist with moving equipment of heavy loads comfortably and safely.. caster-swivel caster