FutureFly Hackle Tool helps you to tie better looking hackles. Just slide the V shaped tip of the tool along the feather stem towards the tip of the hackle, and fibers will pop up which makes tying more easy and will give better look for the fly. Great help when using soft hen feathers. There's also a hole in the tool which can be used for placing conehead.
Diameter of the hole is 1,8 mm and total length of the tool is about 7 cm.