These rail covers are perfect for my application, and I have plenty left over for experimenting with other accessories on my Keymod forearm. I like the way you can easily cut and shape them to fit snugly around the edges of other mounts, and the low profile and texture are great for keeping my small diameter forearm small, more rounded, and not so cold to the touch. I had to use some water pump pliers to gently squeeze them on my forearm, but they fit great, and I could also remove and reinstall them without difficulty. Awesome product for a great price.