This is very simply a small gauge used to measure the length of the hackle.
You wrap the hackle around this gauge to determine if the hackle you've selected is the right size for the hook you're using.
- Wooden Hackle Gauge and Hook Chart
- Fits most vise stems. Graph used to indicate correct size hackle.
- Identify size 4-22 hackles and 4-16 hook sizes.
- size: 2.9in x 0.9inch x 0.2inch weight:0.34oz