Features: Made from copper. Stonewash finish. Description: Flytanium has done it once again, bringing a high-quality replacement part to the market. This thumb stud is a replacement for your Demko Knives AD20.5 thumb stud, letting you add a touch of personal flare. Pair it with a set of fancy aftermarket scales, and you'll have a nearly custom cutter! Pocket knives are a joy to personalize. Pick out your favorite and add your twist!