Suspension Gate Roll: This suspension gate roller is widely used and the spring-loaded design can make the door open and close by automatically adjusting the height on uneven ground.Shock absorption and brake: The spring-loaded castors have a load capacity of 220 pounds, and the shock absorption function makes the door movement more comfortable and stable. And with a brake function, the target can always be stopped in the desired place, to avoid sagging of the door.High Quality Material: This is a newly designed door roller that differs from traditional door theory. The universal door leg features high-quality ball bearings, and the built-in spring makes the appearance more beautiful and slows down the aging speed of the spring. The durable rubber wheels are more durable with a telescope length of 0-5 cm.Complete Accessories: We have 2 door wheels and are equipped with 6 screws, 6 nuts and 6 washers. Adjustable spring support, spring type maximum vertical hub of 1-3/4 inches. Automatically adjust the height (0-5 cm) on uneven ground, so that the gate opens freely and closes prevents the sagging of the gate.Easy AssemblyThe spring-loaded door wheel features a powerful universal 3-hole mounting plate, which can be easily connected to the horizontal or vertical running rails of a wooden door or a garden door. Dual ball waves and 360 degree rotation in all directions, with labor-saving design, easy to move and roll, easy to open and close and effortless.Features:1. 360 degree universal turning axis, automatic rotation, does not easily break, does not rust easily and slows down the service life.2. Powerful door wheels are equipped with lateral parking brakes to fix the position of the door.3. Built-in flexible height-adjustable spring, shockproof, can roll on rough or uneven surface, prevent coincidence of the rolling process and closes and opens automatically.4.4 inch rubber wheels, wear-resistant and shockproof, thickened material.5. Non-releasing polyurethane rubber: wheels from this material roll quieter and quieter than other hard rubbers. Tests have shown that it is suitable for most soil types.Description:Product Name: Suspension gate rollerMaterial: aluminium, rubber.Purpose: brake, shock absorption.Load capacity: approx. 100 kg.Weight: approx. 2100 g.Wheel diameter: 10.16 cm / 4 inchBox contents:2 x suspension gate roller.6 x screws.6 x nut6 x extra