Features 1、Heavy Duty Bearing: This sturdy gate caster can support large wooden or steel heavy doors, with each wheel bearing up to 330 pounds, ensuring effortless opening and closing of heavy doors. 2、Unique Appearance: The built in spring design reduces gate stress and prolongs the lifespan of gate hinges, while the metal tube prevents debris from entering the spring, extending the wheel's durability. 3、360° Rolling Spring Gate: Featuring 4 inch heavy duty rubber wheels with a 360° rotating top plate, easily roll in any direction with minimal effort, making it easy to move gates securely in various situations. 4、Easy Installation: The 3 hole universal mounting plate can be easily attached to ethenyl or wooden gate metal fences using square head bolts. The versatile holes allow for installation on horizontal or vertical door tracks with included mounting bolts and screws. 5、Adjustable Spring Loaded Wheel: Equipped with a spring loaded adjustable door wheel, this door wheel ensures smoothly performance for large heavy wooden doors, ethenyl gates, metal pipe doors, or swinging metal gates. Specification Item Type: Spring Loaded Adjustable Gate Wheel Material: Stainless Steel, Rubber Hole Spacing: Approx. 30mm / 1.18in Package List 1 x Wheel 3 x Screw 3 x Washer 3 x Nut