Iron Forge Tools Rolling Storage Rack Caster Wheels Heavy Duty - Set of 4 Locking Castor 3 Inch 530 lb Capacity for Boltless Self Locking Shelving Racks, Nylon and Steel Ball Bearing Wheels

["MEDIUM-DUTY WEIGHT CAPACITY - This 4-pack of caster wheels has a total weight capacity of 530 lbs. The 16 gauge cold-rolled steel and ball bearing swivel mount ensures that you can easily move your heavy-duty shelving around.","EASY INSTALLATION - These rubber caster wheels bolt easily to a for Boltless self locking shelving racks with self-locking shelving systems, and come with all necessary hardware, including 8 bolts, washers, and nuts.","NYLON AND STEEL BALL BEARING WHEELS - The nylon and steel ball bearing wheels provide protection from oils and fuel, making them ideal for industrial applications that require increased heat and chemical resistance.","COMPATIBLE WITH POPULAR SHELVING BRANDS - These outdoor caster wheels work with popular shelving brands such as Muscle Racks, Pallet Rack, and Tool Shelving (Dewalt with some modification). They elevate your shelving from contact with the ground that can cause rust.","100% SATISFACTION GUARANTEED - Iron Forge Tools is a US veteran-owned business founded by a U.S. Army veteran who stands behind his products 100%. If anything goes wrong with your locking storage rack caster wheels, we will replace it with a new item."]