The Boomerang ProGrip Tether is designed to secure canoe, kayak, and paddle board paddles but also allow full use. The adjustable locking system securely clamps paddles, oars, fishing poles and other cylindrical items. The Ratch-It lock system locks the reel in 5 inch intervals. Just pull the retractor to the desired length and the cord locks in place. Tug it again and the reel unlocks and retracts. The carabiner easily attaches to life jacket, boat or railing.