This 8" x 3" cast iron wheel rigid caster offers high capacity at a lower cost, making it ideal for heavy loads in industrial environments.Our 75 Series casters are constructed from high quality heat-treated AISI 1045 laser-cut steel. A precision machined raceway combined with fully welded legs (inside and outside) and kingpinless design delivers superior strength in rugged applications. Kingpinless casters eliminate kingpin failure ? the leading cause of caster failure.