5" x 2" Swivel Caster Polyurethane Wheel Steel Brake (2) & Rigid (2)1000 lbs each Tool Box 5" x 2" Swivel Caster Polyurethane Wheel Steel Brake (2) & Rigid (2)1000 lbs each Tool Box Feature: 3/4" Roller Bearing with 1/2" ID Bushing Bearing: Roller Bearing Capacity: 1000 lbs each Top Plate: 4" by 4 1/2"/ Bolt Pattern: 3" by 3"