ITEM NAME:Foot Master Nylon Alloy Wheel Low Profile Leveling Caster Low Noise Description: Optimum leveling ease occurs at 50% of 4 casters total capacity. Three possible ways to adjust leveling foot/pad, thumbscrew or open-ended wrench Good hard wearing castors suitable for a variety of uses. Easily move heavy workbench or furnitures to desired location. Simple, innovative, and secure foot leveler mechanism. Specification: Material: Alloy Height: Approx. 70mm/2.75inch Bolt Hole Spacing: Approx. 60mm/2.36 inch Package Includes: 1 Piece Leveling Caster Note: Please allow 1~3mm differs due to manual measurement. (1 inch = 25.4mm) Product color may vary slightly from what appears online due to monitor differences..Three possible ways to adjust leveling foot/pad, thumbscrew or open-ended wrench. 1 Piece Leveling Caster. Optimum leveling ease occurs at 50% of 4 casters total capacity. Good hard wearing castors suitable for a variety of uses.