Installation of a Wilson High Ride (#WC298) beavertail requires cutting the frame to fit the beavertail. Our beavertail fitting jig mounts to the hammer and thumb safety pin holes to serve as a filing guide to help prevent over cutting of the frame. Once this cut is made, only a few thousandths remain for final fitting to a perfect match. Complete instructions included on the use of the fitting jig and how to properly install a Wilson's beavertail grip safety.