Select Hardware Spring Loaded Swivel Gate Wheel, 4" Heavy Duty Caster, Black HEAVY-DUTY DURABLE - 125 lbs load capacity per wheel; Our gate wheel has been designed to bear the weight of wide metal and wooden gates as well as garage doors weighing up to 125 lbs IDEAL FOR UNEVEN SURFACES - The caster wheel is mounted on a spring that allows the height of the wheel to adjust automatically as it rolls over uneven terrain, keeping the gate at a level height 360 SWIVEL - Featuring a 360-degree swivel design, for use on left or right-handed gates; It allows the wheel to move and rotate in any direction and over unsteady terrain EASY TO INSTALL - It comes with 2 pre-drilled mounting holes so you can quickly and easily attach it to your gate/door DIMENSIONS - 4 inch rubber wheel, 5.7 inch shaft, 3.7 inch quick spring section, 2 inch absorption movement HEAVY-DUTY DURABLE - 125 lbs load capacity per wheel; Our gate wheel has been designed to bear the weight of wide metal and wooden gates as well as garage doors weighing up to 125 lbs IDEAL FOR UNEVEN SURFACES - The caster wheel is mounted on a spring that allows the height of the wheel to adjust automatically as it rolls over uneven terrain, keeping the gate at a level height