The flush deck mount allows the Alvey winch mount to be flush with the deck or gunnel. The spacer ring provided allows clearance from the deck or gunnel so you can rotate the winch. There is a tension screw that allows you to hold the winch in position and retaining screw to prevent accidental removal of winch from the mount. This mount suits all the Alvey winches. The mount is made from stainless steel to provide protection from the marine environment. Two brass bushes are press fitted into the tube to give smooth rotation of the winch.