Metal rake or hoe

The marra, an iron weeding hook with a broad head and teeth, was used by Roman farmers to cut out weeds and clear fields of unwanted growth (see Columella, De Re Rustica 10.89; see here for a discussion of Egyptian farming implements in the Roman period, including the marra). It is listed among the farm tools about which Pliny the Elder speaks in Naturalis Historia, where he narrates the defense of Gaius Furius Chresimus, a freed slave and small farm owner, who was indited by the curule aedile Spurius Albinus for casting spells on his wealthy neighbors' estates.
Juvenal mentions the marra in a later satire (Satura 15.167), where he again employs the metaphor of farming implements to reprise the theme of contemporary Rome's evils.