The Heavy Duty 4 Pieces 25 Kg Load Capacity Ball Transfer Caster Wheel is a set of four industrial-grade ball transfer units designed for smooth, omnidirectional load movement. Each unit supports up to 25 kg (about 55 lbs), making the set ideal for applications requiring precise positioning and low-friction transfer of moderate to heavy objects. These casters are commonly used in conveyor systems, workstations, and assembly lines to enable 360-degree rotation and multidirectional sliding without manual lifting.