Instant Mobility: This set of four heavy-duty caster wheels is designed for instant mobility. With a stem mount (5/16inch, length 0.98inch) attachment, they quickly and securely attach to small and medium-sized utility carts, furniture, and other commonly found items in workshops, garages, kitchens, and offices. High Load Capacity: Each caster wheel in the set has a maximum load capacity of 150 lbs., allowing for a total capacity of 600 lbs. when used together. These reliable casters are built to handle heavy loads and provide smooth wheeling action on hard, smooth surfaces such as concrete, while maintaining stability with their double lock mechanism. Quiet and Smooth Movement: Enjoy quiet and smooth movement with these casters. Their non-marring polyurethane wheels ensure silent operation, making them suitable for various environments, including warehouses, shops, restaurants, schools, and hospitals. Say goodbye to vibrations, rattling, squeaking, and other disturbances during transportation. Enhanced Stability and Safety: The caster wheels are equipped with a double lock mechanism, ensuring both the wheel and the swivel bearing are locked simultaneously. This essential feature provides enhanced stability and safety during use, giving you peace of mind in any setting. The set includes four locking nuts for easy installation. Versatile Applications: The possibilities are endless with caster wheels. They can be effectively used on workbenches, instrument cases, art tables, and a wide range of other furniture and carts. Wherever mobility is needed, these casters provide a quick and convenient solution, allowing you to move your items with ease. Mounting Type: Stem Mount Stem Diameter: 5/16inch Stem Length: 1inch Caster Diameter: 2inch Swivel Casters with Brake: Yes No Noise Polyurethane Castor Wheels: Yes MaxLoad Capacity: 150lbs/wheel Enjoy a hassle-free installation process with these stem-mounted casters. Simply attach them securely to your desired surface and experience improved mobility and convenience. Color: Black Material: steel Package Contents: 4PCS x caster wheels heavy duty Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.