【STURDY HEAVY DUTY CASTERS】 - SAVING STRENGTH] These casters set of 4 heavy duty are with rock-solid construction, which is made from premium thickened steel housing, thickened top plate and each plate caster has double support bearings. Strong loading capacity is up to 2200lbs as a set of 4 caster wheels heavy duty, each wheel can carry 550lbs, SAVE YOUR BACK AND EFFORT. | 【DOUBLE SAFETY BRAKE】 The 4 inch caster wheels are 360-degree rotating, also each swivel caster has a separate brake which locks both the wheel and the swivel simultaneously. When brake is pressed down, holding the equipment firmly in place, effective to stop and prevent the devices from moving and hurting others. | 【SMOOTH & NON-MARKING】 The heavy duty caster wheels are made of superior polyurethane material, wear-proof, reducing vibration, silent shock absorber, achieve smooth, quiet, and no drag marks gliding experience on various flooring types, especially on uneven surface. What’s more, every castor wheel has dust-proof ring will improve the industrial casters performance by preventing dust coming into the bearings. | 【EASY INSTALLATION & WIDE APPLICATION】 Each package of caster wheels is included 4 swivel casters with brakes, two hardware kits: 16 x Pointed Screws (with 16 Washers) plus 1 x screwdriver, 16 x Flat hex bolts (with 16 Nuts) plus 1 x spanner, which are suitable for two different ways installation. You can easily install the wheels for cart, DIY caster wheels for furniture, workbench, trolley, cabinets, add furniture casters for easy moving. | 【1-YEAR WARRANTY】 All our products are produced under strict quality inspection. We stand behind the quality of our products. If for any reason you are not satisfied with your purchase, please contact us. Hope enjoy these quality-built caster wheels without worrying about wasting money. Your satisfaction is always our top priority.