Utensil in the form of a pole with a pyramid-shaped trunk, with a flat head and feet, made of hard metal and utilized as documented by Filippo Baldinucci (1681) "to insert nails well into the wood, so that the head of the nail is also inserted into the wood; this is done by placing the underneath of the iron at the top of the driven in nail, and hitting the head of instrument with a hammer, and the space that is left on the surface of the wood, above the head of the nail, is filled and welded with stucco."