Its also important to loosen the screws all the way (they will not come out) before fitting them on the rails so you can get them on and move them around before tightening. Buying locally has been challenge trying to find a pair that actually fit. This is great for 100% battery powered speaker systems, where there is no AC. After receiving the product, I like the design of the wine rack very much. -This keyboard can sync with other Corsair LED lit devices to have a continuous pattern. Theres clearly a quality control issue going on here. It was a great price too. They are easy to put on and I love the elastic in the back which helps them stay on. Charge seems to last a while. #ProudNavyMama