Set of 4 All Steel Swivel Plate Casters and 2 with Brake Lock 3" Wheel - Combo Rotate 360 degrees. The side brake locks the wheel Capacity: 300lbs each. Plate Size: 2.5" (63mm) x 3.5" (90mm) Hole center to hole center: 1.7" (44mm) x 2.8" (72mm). Mounting hole dimensions: 0.39" (10mm) Wheel Dia.: 3" (75mm). Wheel Width 1.1" (28mm). Wheel Material: Iron. Overall Height: 3.8" (97mm). Includes: 4 pack 3" caster (2 no brake & 2 with brake)