The Shepherd Hardware Soft Rubber Casters give mobility to heavy loads on smooth, hard surfaces and finished concrete floors where quiet movement and floor protection are major considerations. The Shepherd 9019 model is a light duty caster with a 5 inch wheel diameter, 325-lb load rating, and rigid plate mount. Shepherd 400-Series casters are recommended for tool boxes, bakery racks, dollies, stock trucks, hotel trucks, and other institutional uses requiring excellent mobility.