Galvanized steel wood beam hanger uses only one bolt with teeth on top of the hanger to prevent it from turning after installation. It has an "oil lite" bronze bearing and axle bolt with lock tight nut and accepts a 12mm bolt. It has a shackle pendulum that does not require an S-hook for connections to the chain but is tamper resistant and requires an allen wrench with special hole to open and close. Plate is 2 ¼" x 1 ¼". Holds up to 5000 lbs.
Hangers should be spaced 2 ft from the end of the set and 2 ft a part for each swing. Unscrew the bolt holding pendulum bushing in place. Take the pendulum out. Put bolt (not included) up through top of swing hanger and up through wood. Screw nut (not included) down snuggly on bolt. Put pendulum back in center of swing hanger and bolt back through pendulum and attach lock-tite nut. Grease or oil bushings if squeaking noises are heard. Use the H175 to open shackle bolt. Slide chain on the bolt and then tighten in the hanger until snug.