Hamilton organizes its kingpinless caster offeirng in three broad catgories and offers nine series which covers wheels froom 3" diameter up to 18" diameter and capacities up to 17,500 lbs. Many of our heavy duty kingpinless offerings are stocked for same-day/next day PRONTO® shipment. Optional extras—such as locks and brakes—are widely available. Unlike many competitive models, Hamilton’s kingpinless caster lineup is made from forgings—which have the ultimate tensile strength. These forgings are machined to precision tolerances and the raceways are hardened. As a result, you can have peace of mind using the most rugged casters in their category. They are ideal for automotive plants, boat manufacturers, warehouse towing applications and any material handling applications which require moving up to five tons.