The 17 Most Misunderstood Facts About tree swing hardware
https://www.evernote.com/shard/s384/sh/c8498658-2a5b-476d-a8be-e56ce667883b/51a020255dae4c74fe7df048c1ff0b43
Very happy with the quality of this swing. The only change I would make is for the bolts of the swing to be outward away from seat. Otherwise very durable and I love the coated chain for pinch free swinging.