Review on 🔒 Sea To Summit Unisex's 1 Pin Field Repair Ladder Lock Buckle-Black, 25 mm: Durable and Convenient Solution for Outdoor Gear by Jerry Chembola

Works great, the top unscrews so you can attach a backpack with a webbing strap. I mean the shoulder strap is actually two straps on my backpack, the top strap is sewn into a closed loop at the end. All other replacement parts are a single piece of plastic, so there's no good way to attach the buckle. It has a metal bar that can be screwed in, so just insert the metal bar into the top loop and rock your uncle, the buckle will be replaced.