SORMA Outdoor Key Holder - Waterproof & Durable Key Organizer for Hiking, Camping, and Travel - Perfect for Backpacks, Jackets, and Outdoor Gear

The process is straightforward, it's a screw that goes through one side and threads into a nut on the opposite side.Getting the screw lined up is another story when you're trying to keep multiple keys in place, align both sides, and blindly thread a screw into a very short nut.There is also no way to remove a single key without disassembling an entire side.The device works, but it has an annoyance factor I was not aware of. Opted to go back to a regular key ring.