This original JCD invention is another great solution to keep your spinnaker sheet from falling down around the bow. The Bow Doinker is 3/4 in wide by 9 in long machined Delrin. Low profile (1/4 in) base sticks to the bow with waterproof, double stick tape. Base has a dovetailed groove with an adjustable sliding 14 in Delrin stem. Adjust length and lock with finger-tight set screw, included. Stops at each end of the stem to prevent loss.