Theromplastic rubber (TPR) is an ideal tread choice for clean, noise-sensitive areas where floor protection and quiet operation are critical. The cushioned grip of the rubber surface provides a smooth ride, even over small obstacles. TPR is a durable, non-conductive material that resists chemicals, steam, salts, and oils. This caster's swivel rig aids maneuverability through turns, and the total lock both prevents the wheel from rolling and stops the swivel mechanism to completely immobilize the caster during loading, unloading, and other operations.