Of2 Heavy Swing Hangers Stainless Steel 304 Rust-Proof Playground Porch Yoga seat Hanger Swing Hammock Chair Suspension kit Indoor and Outdoor 2000 pounds Capacity 2 carabiners

Swinging bench hardware will do great, something like this and some chain or rope will work fine. Drill the pilot holes if you get that one. Any set from a hardware store will work too. Edit: Just don't hang the hammock guitar string tight; no hardware is for that.