Bests & Worsts Reviews from Amazon

I'm using this 5 shelf unit in my garage for extra storage. It is well built and was easy to assembly. I didn't have any problems with bent hardware as did some of the other reviewers. Take care to make sure you have all 4 sets of wedge clips set at the same height- the poles have double grooves periodically to help you make sure you get all clips at the same height. Gently lower the shelf down over the wedge clips, and then push down on each shelf corner while simultaneously pushing up on the wedge clips to make sure they don't slip down on the pole. I accomplish this by putting my palms on the top of the shelf corner and allowing my finger tips to wrap around and touch the bottom of the clips. A bit of squeezing together and the shelf corner rings are making good contact with the clips, keeping them together and prevent them from slipping out of the groove on the pole. Easy peasy! I put casters on the bottom of my shelf to allow me to move it around in my garage. I initially ordered casters with a metric threaded shank (M8x1.25), based on responses to product questions on the subject. However, when my shelf arrived I discovered that the threaded inserts were actually a SAE thread - 3/8-16 (coarse thread). So I ordered these casters from Amazon https://www.amazon.com/gp/product/B00TKQCVDE/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 They weren't quite as nice as the metric ones I first bought (no brakes, little more slop in the ball bearing, more expensive, etc.) but they worked fine for the shelf and allow me to easily move it around on my smooth garage floor while loaded with boxes. The wheels are fairly small and probably wouldn't work too well on rough finished concrete.