Super simple. Easy to use. Superior grip to all my other hackle pliers.
I was pleasantly surprised when I tried these pliers at my local fly shop and had to own one. The plier has an excellent amount of tension keeping even the slipperiest feather stem in check, also the smooth loop allows you to keep your finger in one place and rotate around the fly, allowing you to focus you other hand on making sure the feather fibers lay down the way you want them to.
Very happy with the grip on material, this is my go number 1 tool.