Challis hex drive bushings use a 7/32” nut driver for secure installation without damaging cross threading, and are designed for easy removal.
Optional O-rings can be used with the bushings to keep grips tight, protect against shock and minimize scuffing of the frame by abrasive grip materials.
The bushings are reusable, suitable for 1911 models, and require the Challis Oversize Thread Bushing Tap for installation.