This fixture is designed to hold 1911 barrels square in your mill vice to allow you to cut the width and length of the hood in one setup. For use on all length 1911 bushing and bull barrels. Will not work with "Island" barrels. When used properly this fixture can greatly reduce the time required to cut your barrel hood to proper dimension. Very precise cuts can be completed with this fixture. See our video below to learn how it is used.