Small nylon polymer hinges for smaller gate applications. This robust self-closing hinge will last for many years as nylon polymer will not rust. The hinge can be used for aluminum gate installations or replacements as well as other applications. A pin is included to adjust the tension of the self-closing mechanism. Please do not over tighten as this may damage the hinge. Screws are not included. You will need to purchase four screws per hinge (self taping metal screws for aluminum or wood screws for wood fence).