A scraper used by drawing a thin flat or finely toothed edge back and forth across stone rather than striking it with a hammer.
Raschietto is a scraping tool used without hammer blows. Le voci del marmo notes that a scraper may resemble a chisel, ferrotondo, or toothed tool, but is drawn back and forth across the surface rather than driven by percussion. Many examples have a thin flat or finely toothed edge and a bent working end resembling a small rake.
Etymology
From Italian raschiare, “to scrape.”
Sculptor Notes
Scraping removes stone with a different tactile feedback from either chiseling or rasping. It is especially useful where the sculptor wants controlled shaving and surface correction without the shock of percussion.
References
https://levocidelmarmo.sns.it/scheda_oggetti_relazione.php?denom=raschietto&id=21