Spring-Loaded Design: The gate wheel features a built-in spring design, allowing it to roll smoothly over uneven or rough surfaces, reducing stress on gate hardware. It also slows down spring aging and extends the lifespan of gate posts and hinges. Vertical Self-Adjustment: The adjustable spring bracket provides up to 1.75 inches of spring-loaded vertical travel, automatically adjusting the gate's height to the surrounding terrain during opening and closing. Effectively prevents gate sagging and keeps the gate roller aligned with the fence line. Durable Construction with Brake: This 4-inch diameter spring-loaded gate wheel is made from thickened steel plate and features double ball bearings, providing a high load capacity of up to 220 lbs per wheel. Enables easy opening and closing of wide and heavy gates. The brake provides enhanced control. 360° Rotating Wheel: The hard rubber gate roller is suitable for all terrains, including asphalt, brick, concrete, dirt, grass, and gravel. Easily converts to any direction, allowing you to move or stop the gate safely with minimal effort. Easy Installation: With the sturdy 3-hole universal mounting plate, the gate bracket easily attaches to wooden gates or along the horizontal or vertical rails of a tubular farm gate. Mounting screws and bolts are included.