No tools needed to mount them onto boom the first time. In only 10 seconds they are ready to use on your boom! Easy to use while sailing. Includes outhaul rope. Thick webbing easy to grab, for pulling more outhaul for less power. Does not damage the monofilm and boom area while sailing. A must for freeride, slalom, and racing sails! Metal Cleat for millimetrical releasing the outhual for more power.