New from HMH, the Universal Shank Adapter Tool clamps conveniently in any traditional fly tying vise jaws, and gives you the best hold on any straight shank with a diameter greater than .035 inches. Also designed to hold plastic or metal tubes up to 3/32 inch diameter, the HMH Universal Shank Adapter Tool comes complete with two long l-shaped pins to help stiffen softer platic tubes when tying.