The 5″ Grey Swivel Plate Caster with Brake is a direct-bolt caster with a 4″ bolt pattern. It can be used with a 1-3/4″ bolt for single 1″ x 1″ tubes or a 2-3/4″ bolt for 1″ x 2″ tubes, along with a Nyloc nut to ensure stability. With a weight capacity of 500 lbs. per caster, it is commonly used for carts, mobile flow racks, workstations, etc. The 5″ Grey Swivel Plate Caster with Brake is made of durable materials and designed to provide smooth and easy movement. The brake feature allows you to lock the caster in place when necessary, ensuring stability and safety.