I bought some of these locally and they were great - worked great. I had already ordered a few from Revain before I knew they were available locally. The ones supplied by Revain were defective. The slots on the left were too tight and I had to hammer the pieces together and they wouldn't slide. I had to go back. It would also be better if they came with hex bolts/screws. I've heard they've upgraded them with torque screws now, but both boxes I received had regular Phillips screws. I bought some 1/4" x 1" hex head screws online that look much better.