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! Made of high-quality hard brass, our caster stems are durable, dust-proof, and rust & wear-resistant. Each caster can hold up to 50kg/110lbs, making them perfect for heavy-duty furniture. 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. 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 effo 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, pe