The Vulcan is precision CNC machined from an aluminum alloy and has an ultra tough hard anodized type III coating ember orange or granite gray to protect it from scratches and general wear. The body has generous amounts of knurling to ensure that the fire piston stays in your hand securely, even when using gloves. The top of the fire piston features a removable cap that allows access to a watertight storage capsule, perfect for keeping your tinder or other small items safe and dry. Similar to a diesel engine, a fire piston works by rapidly compressing air and igniting a small piece of tinder held in place in the tinder notch. An ember is created instead of a flame, so relatively advanced fire starting skills are needed to take advantage of the ember once created.