The YakAttack SUP Leash Plug Adapter with RotoGrip Paddle Holder attaches to stand up paddle board leash plugs. Includes a YakAttack RotoGrip Paddle Holder that is compatible with standard shaft paddles. Two black spacers are included as well. The spacers are used to adjust the height of the paddle so the j-hook doesn't come in contact with your paddle shaft. Start out using one spacer and tighten till snug. If the top of the metal j-hook comes in contact with your paddle shaft then add a second spacer. Do not over-tighten.