These castors are ideal for woodworkers who may need to move heavy pieces such as workbenches, table saws, router tables, drill presses, thicknessers etc from time to time in their workshops. These four urethane casters feature a foot-activated lift mechanism that engages or disengages with the touch of your toe. Built from durable steel, they are designed to hold the heavy stuff. Each castor is designed for a weight of at least 45 kg. The four castors in this set combined will handle at least 180kg.