USES: Look at the pictures above at the very top left which will give you a couple of suggested uses for this swingset hanger. DIMENSIONS: The bottom picture above has dimensions. As you can see, these are rather large and quite beefy and heavy, but in a good way. INSTALLATION: This comes with two 1/2" pre-drilled holes for bolting installation to wooden beams, cedar wood, rafters and/or concrete. Screws/bolts are not included, but you may use 3" lag bolts, Hex bolts, Carriage bolts as best fits the condition for installation CHOICES: Ideal indoors or outdoors for sports playscape accessories, plastic coated swinging chain inside or outside door, hanging swing n slide bracket accessories or swings seat, also hangs commercial grade swings, super spinner, flying antigravity aerial yoga sling inversion, gymnastics rings equipment, climbing rope ladder with platforms or hanging chair, baby infant toddler buckets swings, trapeze rings swings, swing seats belts, web, sky chair, orbit, net, pod, nest , web, cocoons, a ez wood frame bracket, swing-set brackets kit, door, porch swing springs, hammock cradle chair suspension hardware kit, swivel hook snap, or other swing set stuff. RUST: The surface of Jungle Gym Kingdom's swing hangers is coated with DACROMET, not galvanized. The process is that DACROMET is baked on, coated again with DACROMET, then baked on a second time, and coated again with DACROMET and baked on for a third time. Salt-spray tests are used to determine the protection duration for various surface treatments. Through salt-spray testing, DACROMET has proven to be every bit as capable at preventing rust in comparison to galvanized. In fact, it can be debated that DACROMET is better. All numbers stamped on swing hangers are only a batch number used by manufacturer.