Velcro strap for fixing the listening point to the boom of your laser or other dinghy. - Velcro strap for fixing the listening point to the boom of your laser or other dinghy. Clew Strap for Laser® DESCRIPTION The Ultimate Clew Tie Down System for the Laser®. One End of the Strap Has The Loop Velcro on Both Sides. It then sandwiches between the hook velcro, providing so much contact are that the strap will not slip. Can be used with a clew hook, with or without harken airblock, to create a quick easy and reliable clew system. LASER ® is a registered trademark of velum limited an performance sailcraft australia ltd.this product is compatible with laser ® but is not an original laser ® product.