Kanulock Locking Tie Downs provide security and peace of mind to paddlers when leaving kayaks and boards unattended on roof racks. They work exactly the same way as a regular set of tie downs; however, they can be locked with a key and are reinforced with 2mm x 2.5mm braided stainless steel cables, making them almost impossible to cut without special tools. By placing the widest part of your board or kayak between the tie downs, you make it impossible for your craft to slide out. Soft, padded buckle covers protect your board or boat. Comes with two keys. Available lengths: 8 ft. Green Perfect for two surfboards or one stand-up paddleboard. 11 ft. Orange Perfect for two stand-up paddleboards or one kayak. 13 ft. Yellow Perfect for canoes, large kayaks or multiple stand-up paddleboards. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Tie Downs.