The carbide blade in these scrapers stays sharp about 50 times longer than steel. The blade is just a bit convex to avoid corner digs and is reversible, which doubles its life. It is an excellent paint scraper, but it is also useful for cleaning glue lines and for heavy scraping jobs in the shop.
The regular scraper has a 2" blade; the heavy-duty model has a 2 1/2" blade and a knob to assist in scraping. These are particularly clean-cutting tools.