Heavy Duty Caster: Constructed with 45# steel and featuring a stainless paint coating, our casters offer exceptional durability and resistance against wear and tear. Electroplated Anti-Corrosion: The galvanized surface ensures long-lasting protection against rust, making these casters ideal for both indoor and outdoor use. Powerful Load Capacity: With each caster capable of supporting up to 150kg, you can trust them for heavy-duty applications without compromise. Quiet Operation Due To Carbon Steel Ball Bearing Design: Experience smooth and silent movement thanks to the dual bearing design that reduces friction and noise. Easy Installation: Four precisely positioned holes facilitate quick and secure mounting on your desired surface. Engineered for reliability and efficiency, our U Groove Wheel is your go-to solution for demanding applications where strength and ease-of-use matter most. With its V-shaped lifting caster and thick steel construction, it's designed to handle heavy loads with ease.