Suit any 7mm Bungee Cord Simply cut your bungee with a hot knife (or seal end after cutting with knife) insert into end and slide collar on to lock into place. Plastic hook mainly for kayak，schoolbag, knapsack, travelling bags, camera bags, computer bags, bags series. Add Bungee Cord to make Paddle, Rod Leashes, Cargo Net USE: 1.Insert cord through the hole in the collar 2.Push fit the hook Material: plastic. Length:33mm For use with 7 MM cord