Chim-A-Lator® 152040 Turn Buckle - This Turn Buckle is for use with the Chim-A-Lator® Top Sealing Damper. It is created with durable materials. The Chim-A-Lator® easily mounts on top of a masonry fireplace flue and is operated by a convenient, adjustable regulator installed on the side wall of the fireplace.