This Zipper model has a feather etching on the handle.
The Winkler/Jason Knight Zipper is a collaboration design and one of the best neck knives ever made. It's made of super-tough 80CrV2 with a black oxide coating to resist corrosion. It's got some strategic gimping on the thumb ramp and where the middle finger naturally falls, allowing for the best two-finger grip ever. The knife includes a locking Kydex sheath and a Nite-Ize S-Biner, for a variety of attachment options.