▶HEAVY DUTY:Caster wheels can help you move anything easily to different locations as required, they are great all-around and solid casters, also can effectively stop and prevent the device from moving and hurting others. ▶FLOOR PROTECTION:Casters Set of 4 Heavy Duty with Brake is made of superior polyurethane with strong abrasion resistance, silent shock absorbers ,wearproof ,no drag marks,do not cause damage to your floor. ▶DOUBLE LOCKING:The holes of Caster wheels are well-made and well crafted overall,caster wheels are super easily to assemble and operate,because the total locking mechanism locks both the wheel and the swivel simultaneously. ▶360 DEGREE ROTATION:The locking casters with max flexibility and safety can spend a little strength on moving the equipment easily, also can make equipment rotate 360 degrees smoothly and quietly. ▶WIDELY USED:Can be used in both industrial and residential applications, for shopping carts, desk,dollies, furniture,plant stands, workbench, bookshelves, underbed storage and so on.If there is any problem with the product, please feel free to contact us by email. Our Industrial Casters include 2 inch/ 3 inch/4inch casters wheels, they are sold at 4pcs a pack,each plate caster is very sturdy and strong, which can help people bring much convenience on work and life. The industrial Casters are black, not easy to rust, the wheel material is polyurethane, durable, silent.Casters with brake, the total locking brake locks both the wheel and the swivel simultaneously.For Workbenches/Furniture/Dolly/Trolley