Heavy Duty Total Locking Caster Set - 5" x 2" Black/Grey Polyurethane Round Tread. Plate size: 4" x 4-1/2". Bolt hole pattern: 2-5/8" x 3-5/8" to 3" x 3". Wheel material: Black Polyurethane Round Tread (non-marking). Load capacity: 750 lbs per Caster (3,000 lbs for the set).
Features: Total lock brake, locks down the wheel and swivel bearing.