Including 4 rollers (2 rollers with brakes and 2 without) and 16 screws. Can be rotated 360 degrees. The wheel brake only locks the wheelCapacity 11.3 kg per wheel, 45.4 kg in total. Ball bearings: single ball bearings^Plate size: 38mm x 33mm. Mounting hole diameter: 4 mm. Screw size: 4mm (diameter) 16mm (length)^2.5 cm diameter TPE wheels. Very quiet and stable. Soft and non-slip wheels leave no marks on the floor^Wide Range of Applications: Often used for small projects and moving furniture such as dressers, boxes, under-bed storage, shoe baskets, toy baskets, closets, bookshelves, easel, etc.