The streamline design of these hidden cleats provides a neat clutter-free look to your deck or gunnel. The push-down mechanism quickly and easily releases and locks cleats. Positive lock mechanism eliminates rattling in open and closed positions. E-Z design is simple to install. Just drill holes and drop into place. No saw or special socket lengths are needed. Only 1/2" high in the closed position. Feature 100% 316 stainless steel construction, built-in barbed drain holes, and high-polished mirror finish. No saw or special socket lengths are needed 1/2" high in the closed position 100% 316 stainless steel construction | Stainless Steel E-Z Push-Up Cleats - 4 1/2", ea