Floor Protection It is wrapped in soft polyurethane material to ensure that there are no scratches or marks on the floor and it is easy to move. Stable Structure Diameter: 50 mm. The tires of the swivel casters are made of sturdy hard rubber, the stable steel construction can carry objects up to 100 kg. (Up to 27 kg per roller) Thanks to the galvanized steel frame, the casters can easily be used indoors and outdoors. Reinforced Design The L-shaped mounting plate saves space and is easy to install. The newly upgraded five mounting holes fix the guide rail in a horizontal direction and are not easy to deform. The corners are reinforced to make the mounting plate more stable. Wide Range of ApplicationsUsually used in small projects and furniture moving, including dressing tables, boxes, under-bed storage, shoe cabinets, toy boxes, wardrobes, bookcases, easels, etc. What You Get2 x Swivel Casters with Brake, 2 x Casters without Brake, 20 x Screws (T6mm x L10mm) Universal Use: Ideal casters for small to large furniture and small bedroom furniture, including: trolley, ottoman, coffee table, plant stand, pallet, garden, bookcase, shoe basket, toy basket, shopping cart, workbench, under-bed storage, planter or table saw. Features: Material: TPE rubber, steel Colour: coffee Scope of delivery: 2 x brake castors 2 x swivel castors 20 x Screws