A compact block-like hammer of hardened steel used to drive point chisels, scapezzatori, wedges, and related heavy stone-carving tools.
Mazzetta is a compact striking tool of hardened steel. Le voci del marmo describes it as a parallelepiped of tempered steel used to drive a point chisel with a softer head and hardened point, and also to drive the scapezzatore so flakes are detached from the block.
Etymology
Italian diminutive of mazza, “club, sledge, or striking tool.”
Sculptor Notes
The mazzetta gives a harder, more direct impact than a wooden mallet. Tool choice changes not only force but also rhythm, shock, and the way the chisel enters the stone.
References
https://levocidelmarmo.sns.it/scheda_oggetti_relazione.php?denom=mazzetta&id=40