Review on Safe Kidz Heavy Duty Swing Hangers: Complete Set of 4 Playset Hangers for Wooden Swing Sets with Mounting Hardware and Easy Installation by Derrick Feliciano

These swing arms will hold even the biggest kids! They are strong, with strong screws for attachment. After installation, you can remove the engine block from one of them. Obviously you use 2 of these for each round. I weigh 300 pounds and have rocked on them. Apply a little non-toxic lube to either side of the part that swings in the mount (the swing chain is attached to it) and it will swing for a while before your child needs another nudge. I have no doubt that they will last the life of the swing and beyond.