Review on MaxGear Universal Non-Skid Heavy Duty Metal Bookends For Shelves - Premium Book Stopper For Books, Movies, CDs, And Video Games - XL Size (2 Pairs/4 Pieces) - 8.5 X 5.9 X 7.8 Inches - Black by Ogunjemilusi Cheatham

They are the right weight and a pretty good price for what you get, but I made the mistake of trying to pop off the zip-ties. Upon using leverage force to remove them, the metal simply bent. Now, that being said, it holds up solid against the books as it was designed to do.but I was a little annoyed steel bent so easily. It's a thin frame so that was probably what gave it the weak-point.All in all, it's a good price and does exactly what I want it to do. I just should have gone straight to the knife instead of straight to the "rip and tear until it is done."