A piercing saw is a saw equipped with a thin blade used in watchmaking for fine work such as openwork and skeletonisation a movement. This saw can easily be used to saw bridges and mainplates in materials such as german silver, brass or gold. Steel can sometimes also be sawn with a piercing saw, although this material is a little more difficult to work than the previous ones. This is rarely the case in watchmaking, but wood can also be sawn with a piercing saw. Piercing saw blades can break from time to time, but replacing this consumable is not too problematic.