The most versatile and basic high quality bobbin holder.Tubes of standard length and thickness can be used with threads of various sizes, making them versatile.It has a weight of 17g so that the fixed material will not loosen even if you release your hand.The micro-slit foam set in the entrance area prevents the thread from getting tangled with the arm, ensuring comfortable fly tying.Uses high-quality ceramic (zirconia) tube to prevent thread breakage.One dedicated bobbin threader is included.Please open and close the arm to obtain the appropriate tension..