TMC Twin Hackle Gauge
This little helper from TMC has two pins for measuring the hackle length. The Twin Hackle Gauge impresses with its usual high Tiemco quality and is made of aluminum. It can easily be mounted on the trunk of the vise and simply turned backwards when not in use. The standard pin is suitable for measuring the hackles for any standard fly pattern and the second pin is perfect for parachute patterns.
Tiemco's Twin Hackle Gauge fits most fly tying vises on the market.