Whitelotous Electronics Soldering Iron Pen Shaped Cordless DIY Butane Gas Gun Torch Note: Unit is shipped without fuel, this item is not auto-ignite, so you need to use your own fire source to start it. Do not fill the tank with full of gas, otherwise it will cause fire because of the pressure, and also the air exhaust hole will be blocked up. This is a excellent Cordless Soldering Iron. It is ideal for that delicate. Melting, softening, reshaping jobs that a standard blow torch would not be sufficiently or precise enough. Melting, softening, reshaping jobs that a standard blow torch would not be sufficiently or precise enough. Will hold just enough gas in its chamber to make sure you get the job done safely and fully finished.