Recently on our scope mounts, we switched over to ring screws with a pre-applied thread locking compound on the threads. This thread locking compound takes place of the Vibra-Tite that we previously supplied with our Recon, Scout and Delta scope mounts. These screws are re-useable, and no other thread locker needs to be applied. We will still provide Vibra-tite with our red dot, flashlight and other various mounts.