CASTERS SET OF 4 HEAVY DUTY: Our 4 inch casters are adopted high strength stainless steel electrophoresis plated stand, precision ball bearings with protection of additional dust-proof ring, which gives them a long lifespan and makes them to protect against corrosion and rust.

ROCK-SOLID CONSTRUCTION: The total loading capacity of 4 inch caster wheels is up to 2200lbs as they are using premium thickened universal steel column, thickening plate and each industrial caster has double support ball bearings, durable, can easily maneuver your furniture by spending a little strength.

SAFETY DUAL LOCKING, SAFETY AS YOU NEED: Each wheel is 360-degree swivel and designed with a double safety brake. When this brake is pressed down, both the wheel and the swivel are locked simultaneously, holding the equipment firmly in place. Effective to stop and prevent the devices from moving and hurting others.

SMOOTH & NON-MARKING GLIDING: The caster wheels heavy duty are made of high quality vibration-absorptive polyurethane, offers the elasticity and silent shock absorber, durable, achieve ideal smooth, no drag-mark gliding experience on various flooring types.

WIDE USE AND EASY ASSEMBLE: Our heavy duty casters are easily and conveniently to install, comes with two hardware kits: 16 x bolts, 16 x nuts with 1 x screwdriver, 16 x screws, 16 x washers with 1 x spanner, 1 pair of gloves, satisfy various and different needs. Widely used for indoor and outdoor equipment, like used for cart, furniture, workbench, toolboxes, electrical enclosures, speakers, trolley etc.