Long life tips are excellent heat conductive soldering tips made from pure copper. They are iron-plated making them multiple times more durable than regular copper tips. They are chrome-plated on the outside and therefore are corrosion free. The tip is factory pre-tinned which improves the performance of the tip. A good long life tip decreases solder joint failure and increases soldering production. Note: Long life tips cannot be filed as this will damage the tip structure.