Designed for use with our heavy duty Z Racks but these strong caster wheels can also give instant mobility to stationary objects in your workshop, garage, warehouse, and much more. Our wheels come in four-packs. The 2.5-inch heavy duty threaded stem caster with locking brakes give fluid mobility to heavy loads on hard industrial surfaces such as finished concrete floors, where quiet movement, smooth cornering, and floor protection are necessities. 100 LB LOADCAPACITY PER WHEEL. Each caster supports 100 lbs. of load (with a 400 lb. total capacity for all four wheels). Two of the casters have brakes while all four swivel 360-degree pivoting action for smooth wheeling on hard, smooth surfaces such as concrete with very low dragging. Double lock mechanism of both swivel and wheel rotation ensures stabilit Additional Details ------------------------------ Product description: Designed for use with our heavy duty Z Racks but these strong caster wheels can also give instant mobility to stationary objects in your workshop, garage, warehouse, and much more. Our wheels come in four-packs. The 2.5-inch heavy duty threaded stem caster with locking brakes give fluid mobility to heavy loads on hard industrial surfaces such as finished concrete floors, where quiet movement, smooth cornering, and floor protection are necessities. 100 LB LOADCAPACITY PER WHEEL. Each caster supports 100 lbs. of load (with a 400 lb. total capacity for all four wheels). Two of the casters have brakes while all four swivel 360-degree pivoting action for smooth wheeling on hard, smooth surfaces such as concrete with very low dragging. Double lock mechanism of both swivel and wheel rotation ensures stabilit