Adjust-A-Gate Hard Rubber (Left Swing) Swivel Gate Wheel with Suspension (Up to 125Lb Load Capacity) FLAT FREE HARD RUBBER - 5in. Diameter wheel UNIVERSAL FLANGE ATTACHMENT - works for wood or metal gates. Flange design keeps wheel from hitting the gate EASY ON-SITE ASSEMBLY - No cutting required, simply attach to existing gate frame HEAVY DUTY SPRING SUSPENSION - The swivel gate caster is spring loaded to absorb the weight and relieve stress on the gate hinges PREVENTS GATE SAGGING - Allows large gates to open and close with ease