Features 1、Strong Support: Thickened power steel plate together with double ball bearings ensures strong load capacity. 2、Small Vibration: Spring clamp can absorb the shock when the door caster rolls on a bumpy or rough surface. 3、Good Materials: Using premium rubber and stainless steel, has high mechanical strength for long term using. 4、Easy to Install: The 3 hole design enables convenient installation that can be completed with fasteners. 5、Flexible Using: Suits for family doors and factory gates, etc., rolling smoothly without damaging the floor. Specification Item Type: Spring Loaded Gate Caster Product Material: Stainless Steel Wheel Material: Rubber Wheel Diameter: Approx. 100mm / 3.94in Wheel Width: Approx. 25mm / 0.98in Use Scenario: For door. Package List 1 x Spring Loaded Wheel