QWORK Storage Rack Caster Wheels, 4 Pack 3" Heavy Duty 500 lb. Max Total Capacity Storage Shelf Accessories, Fit for Boltless Self Locking Shelving Racks

Very cool item to have, quality of this product is excellent

These are the best casters I found for using on storage shelves with the right angle metal legs. Not a perfect fit as far as matching up holes, but I just needed to drill a couple of fresh holes and use some washers to make everything fit nice & snug. This isn’t an issue unique to these casters though. (Would be nice if all shelf makers made it easier to add wheels since it’s a huge convenience for customers, especially with big shelves that are hard to move.) These are actually a life saver and the best casters I’ve found for heavy duty metal shelving with right angle legs. With 1000 lb max capacity I’m not worried about stressing out the casters with what’s on my shelves. They are not cheap, but what truly heavy duty casters are? Buying the 8 pack provides some savings over a 4 pack and is worthwhile if you have multiple shelves you want to add wheels to.

Needed to drill some holes into racking to match bolt area for wheels but works great!

Needed a way to move a shelving unit in order to access enclosed trailer that I bring into garage for winter. These installed easily and work great. I especially like the locking funciton as when engaged, it locks the wheel from rotating and also the position of the wheel. This allows the shelving unit to remain firmly in place. The wheels are also very sturdy and quite heavy-duty. Excellent item and worth every penny.

Heavy duty wheels for a heavy duty rack. These wheels made it easy to move the big rack in the corner of my garage that I previously could barely lift the end. Although there were no instructions included, it was easy enough to figure out how to attach the wheels to the rack. It's nice that you can lock the wheels to prevent the rack form being accidentally moved. If you have one of those heavy duty racks and want to be able to move it while fully loaded, these wheels are a great solution. Please unload the rack first so you don't have it tip and kill you. :) And the price was quite reasonable. Highly recommended!

Used it for my glass kiln. Works great. Makes a huge difference.