QWORK 3" PU Caster Wheels for 2"x2" Boltless Shelving Racks 4 Pack 1500 lbs Load, Heavy Duty Mobility Set for Garage, Storage, Workshop

FIT TYPE: Designed for boltless self-locking shelving racks with 2"x2" square tube legs. | LOAD CAPACITY: Supports up to 1500 lbs total, equal to 375 lbs per wheel set. | EASY INSTALLATION: Slide-in mounting fits into hollow uprights, no bolts required. | SMOOTH ROLLING: PU wheels provide quiet motion and shock absorption on flat ground. | SET INCLUDES: 4 caster wheels with washers and screws for small top holes only.