Easy to install Spring-retained design for quick assembly. Push the spring in or pull from the opposite side to fit the roller into the conveyor frame, enabling fast installation and disassembly of your roller conveyor system. Versatile uses These steel rollers can be used as replacement rollers or on a roller stand for woodworking, saw stands, and material stands. They are suitable as boat rollers, dock rollers, rollers for loading and unloading kayaks, sports bike tire rollers, or transfer tape rollers. They can also be used as fence rollers or in a fence kit. Specifications Includes 2 pack rollers. Sizes and loads: - 25 mm diameter (1.0 inch) with 8 mm shaft diameter; load 5-40 kg (10-88 lbs) - 38 mm diameter (1.5 inch); load 15-65 kg (40-130 lbs) - 50 mm diameter (2 inch) with 12 mm shaft diameter; load 25-80 kg (50-170 lbs) If you need to handle more weight, place rollers at closer spacing to maintain efficiency. Stainless steel construction Made from stainless steel for rust resistance and water resistance. Durable, smooth, and quiet operation with minimal vibrations for reliable performance.