The TMC Dual Finisher is an innovative fly tying tool which can be used for both whip-finisher and half-hitch.
[Standard]
The half hitch hole works up to eye of the TMC100 size 8.
[Midge]
The inner diameter of the half hitch end is 17mm (0.67") and works on size 12 and smaller fly hooks.
Warning: The tip of the finisher is extremely sharp!