Whether or not you use a handplane, the humble card scraper is a must-have tool for dealing with any tearout from the planer or jointer and for tricky grain that a handplane can’t handle. What transforms this piece of steel into a tool is the hook on its edge, often mistakenly referred to as a “burr.” Creating the hook is the key to good performance, and it's very easy to do it wrong. Learn the right way.

From Fine Woodworking #227

Online Extra: How to Sharpen a Card Scraper