It is better known as a wing tip. It is a narrow metal triangular piece that makes the flame spread into a wide flame instead of the normal rounded flame. See the reference for a picture of using it for bending glass (scroll down in the reference). The second reference is a picture.
It is better known as a wing tip. It is a narrow metal triangular piece that makes the flame spread into a wide flame instead of the normal rounded flame. See the reference for a picture of using it for bending glass (scroll down in the reference). The second reference is a picture.