The Brunton Fuel Tool is an accessory thats a necessity, the Fuel Tool has become quite a popular item. Screw it on to any thread-mount butane fuel canister to fill butane lighters and lanterns directly. Theres no need for expensive cylinder fuels when you can get it straight from the butane canister. A protective guard keeps the needle safe and straight. Easily refill your firelight or Helios lighter from your Bruntane, MSR or Jetboil fuel canister. Works with all kinds of refillable butane lighters and lanterns.