@Ivor Thanks. I didn't know the term "scutch", but I've seen such toothed chisels being used to carve stone.
One of the things I liked the best on a recent visit to the site museum at Humayun's tomb is a display of stone carving tools next to a big slab of sandstone showing the progression of stages of carving out the elaborate stone lattice work featured in various places in and around the tomb. First just shallow outlines of a pattern, then very shallow carving, and so on until the full-depth piercing.
http://mughalarch.com/jali.html
(Aside: "scutching" also seems to be the process of preparing natural fibres like flax for spinning: https://en.wikipedia.org/wiki/Scutching)