Renzetti's popular Ruby Tip Bobbin features a unique ruby red tip insert that's perfect not only for detailed fly tying, but protects light diameter threads from fraying or breaking under heavy handed tension too. With smooth-ground ceramic leg-knobs for stutter-free spool rotation, and a comfortable rubberized grip for positive control, Renzetti's HT106 Ruby Tip Bobbin sports a heavy diameter 2.00 inch long barrel for versatile all-around tying performance, and comes complete with a handy blue mono-threader too!