Bad Ass Unlimited Brass Knuckle shift Knob. Machined from solid T-6 Aircraft aluminum, then anodized black and machined again for a cool 3d look. The brass knuckle shift knob will work on a variety of side by sides / UTV's. Our Brass knuckle shift knob is a perfect size to grab and shift gears comfortably. It's not designed as a weapon, its a novelty part.