The Long Scraper Rib is available in four different edge styles: a Smooth edge, an Extra-Fine edge (24 teeth per inch), a Fine edge (18 teeth per inch), and a Regular edge (12 teeth per inch.) The smooth one works great for throwing, the toothy ones are fantastic for scoring, scraping and planing the clay. This is a good tool for sculpting and hand building. Made from high quality stainless steel, these scrapers are flexible