Holland Plastics Original Brand Slat Type Door Curtain/Fly Blind With Pair Of Screw In Hooks For Wooden Frames White Each blind comes with a pair of small screw in cup hooks for easy fitting to wooden frames Simply screw in hooks to wood frame. Once hooks are fitted the blind simply sits on the hooks! Quality wipe clean anti crease material Copyrighted triangular support slat bracket Lets the air in and keeps the bugs out!