KanuLock lockable and steel reinforced roofrack straps. Lock your board to your roof racks. Uncuttable by knife, with key lockable buckles. Take the worry out of leaving your boards on the roof. They work the same as regular tie downs, but with the security of lockable buckles and steel reinforced straps. By placing the widest part of your board between the front and back strap, it’s impossible for the board to be slid out backwards or forwards. Security and peace of mind.