Dog tooth
The dog tooth used by stonemasons and stone sculptors is a special pointed iron with not just one but two points. This tool is used to work off extremely soft soft stone in which the pointed iron would get stuck too much in the soft stone. Softer rock allows the impact energy to be divided between 2 tips and if the pair of tips is stuck in the stone, it can be easily pulled out by pivoting twice thanks to the leverage at the tip distance.
The dog tooth is a pointed chisel made of tool steel with hardened tips. The dog's tooth for soft rock usually has a knob or, rarely, a club head. When working with stone, it is primarily used to work off the bosses (stonemasons speak of bosses) and to level the surface to be worked on in a first manual operation. A dog's tooth is made either from octagonal or round steel bars, with thicknesses between 10 and 22 mm, and lengths from 160 to 280 mm. The tool is driven with a hammer or a stick .