MagiDeal Pack of 6 Black Boat Kayak Canoe Dinghy Bungee Shock Cord Hook Hanging End Hooks Material: plastic Color: black Hook Height: approx. 3.2cm / 1.3 inch Inner diameter: 0.5cm/0.2inch You may install a deck kit ,a tie down strap or just to replace some broken ones on your kayak,boat or canoe.