As its name suggests, scrapers scrape the wood rather than cut it and generally leave a poorer surface finish on the wood than cutting tools. Unlike cutting tools, do not use the bevel rubbing technique with a scraper. In fact the 'bevel' is really a clearance rake and allows the cutting edge to come to a sharper edge. Sharpen or hone it often and take very light cuts with a scraper. You should get shavings; if you are only getting dust, resharpen it. Scrapers come in all shapes and sizes - square edge, round nosed, French curve, box scrapers and hardwood scrapers. The picture shows a 1/2 inch round nosed scraper.