An ancient and mysterious object at first glance, it intrigues, appearing as a medical tool, a precision instrument, or a forgotten curiosity. Yet, it is a technical tool whose function becomes clear once revealed.
No one could guess what it was until the answer was finally revealed. At first glance, this ancient object seems almost incomprehensible. Is it a medical tool? A precision instrument? Or a forgotten collector’s item? Yet, behind its intriguing appearance lies a very specific tool, used for generations in a highly technical profession. And once its function is understood, everything suddenly becomes clear.
The name of this tool, finally revealed
This is a glass cutter, also known as a glazier’s glass cutter. More specifically, the model shown is a Shaw glass cutter (England), designed for precisely cutting thin panes of glass.
The inscription “SHAW ENGLAND” is visible on the metal head, along with a rotating scale graduated from 1 to 6. This detail identifies it as an old professional tool, used in glass workshops.
What exactly is a glass cutter used for?
Contrary to what one might think, this tool doesn’t “cut” glass like a knife cuts food. It actually creates a line of weakness on the surface of the glass.
This fine incision creates a zone of weakness. Then, controlled pressure is applied to cleanly break the glass along the scored line. It’s a precise movement that requires skill and a steady hand.
How this tool works in practice
The operation is both simple and ingenious:
First, measure and mark the cutting line on the glass.
