The fit is dead-on precise whether you grab the 4000 or the other series, so no wobble once everything's torqued down. I spent an afternoon rearranging my whole setup and these made it stupidly easy to break down and rebuild clean.
David K.★★★★★
These brackets lock my modular rack together with zero wobble, and the Series 4000 option matched my existing uprights perfectly. They took about ten minutes to bolt on, and now I can load up the arms without worrying about the whole setup shifting.
Riley X.★★★★★
Installed these brackets last weekend to reinforce a wobbly bookshelf, and the fit was spot-on without any extra drilling. At this price, the thick metal construction feels surprisingly solid.