Package includes 4 x Brass Threaded Stem Casters, 12 x Mounting Screws, easy and convenient to install and use; PLEASE confirm detailed dimension on the third photo before purchasing! Premium Material: Made of high quality hard brass, this set of caster stem is durable, dust proof and rust & wear resistant, lightweight and portable, has strong capacity as the load of each caster is about 50kg / 110lbs. 360 Rotation: The bottom casters can rotate 360 degrees in multiple directions, meeting different moving requiements; metal thick threaded rod connection will make caster install firmly and use safely and steadily. Practical Design: Brass caster swivel provides smooth and easy rolling while not causing noise, easily glide across hardwood floors, carpet, mats and more places without causing damage and could change furniture's direction of movement without effort. Wide Application: Universal design fits for various small equipments and small space furnitures such as cabinet, chairs, coffee tables, plant stands, bookshelves, shoe bins, toy bins, trunk box, shopping carts, workbench, under bed storage, etc, perfect for home, office, factory, supermarket and warehouse.