To be clear this isn't for a raft with a rowing frame. It's an aluminum boat with a 40/30 jet on the back. I need something that attaches to the gunnels and will hold the oars securely at speed.Just use these https://www.nrs.com/nrs-1-loop-straps/pkvc
Don’t need the fancy rings. I also use loop straps for my oar keepers on the oars in my hands. Easiest method to keep them attached when you want them attached and unattended when you don’t.