Tried them on a new frame and they worked fine,know more later. Thanks Bob Demberger

These bushings are beyond expectation! Instead of struggling with a screw driver and probably stripping out or cross threading the bushing or stripping the shoulder. These bushings are driven in place by a socket, all it takes is a 3/16 socket to seat (and torque) the bushing in place. No slipping. No breakage of side wall of the bushing. No struggle when the screwdriver slips off. The bushing is a much finer product, start the thread and drive it home with a socket wrench...effortless. Did it get patented yet?

After having damaged so many standard grip screw bushings (slightly deforming the slot) I have learned of these. And since then I have never reached for a Brownells grip screw bushing tool again. These are much easier to install and remove without ever having to worry about damaging them.

These bushings were very easy to install.... once I bought the nut driver. I struggled trying to get them in without stripping threads. With the nut driver, it was a piece of cake to do right.

I have used Challis grip bushings since Brian brought them to market. They go on every custom gun I build. This is a fantastic solution for a century old problem.