Tru-Close Heavy Duty Hinges - Self-closing, Tension adjustable for swimming pool and other high traffic gates  (Gloss Black Covers) - TCHD1AS3BT World's most trusted safety gate hinges - The Industry leader for high traffic gates Quick and easy to install with simple tension adjustment for smooth self-closing speed No rusting, sagging or staining. UV stabilized. Super-strong polymer, stainless steel construction Black trim covers to hide visible screws, meets all pool safety codes, Limited LIFETIME WARRANTY Residential/commercial square posts, metal gates up to 6'H x 4'W & weighing up to 160 lb. You must have at least .25" spacing and no more than 1" spacing between the gate and gate post.