A piercing saw is a type of saw commonly used in jewelry making on sheet metal. It is usually used on softer metals as the saw is delicate.[1][2]
A piercing saw is shaped like a smaller coping saw. The blade is held in tension in a metal frame.
Blades frequently break. To allow the re-use of broken pieces, the frame is adjustable for blade length. The frame throat size can range from 50 to 200 mm (2.0 to 7.9 in).[1][3]