When using a grinder to put the primary bevel on your blades, as I do, you need a jig that allows you to set the grind angle. Teaching a seminar at a school one day I found these Wolverine jigs and they beat the pants off of all other grinder jigs for sharpening blades. Use to upgrade an inexpensive grinder for grinding a primary bevel on chisels and plane blades. A simple, Heavy duty, well made jig. Features Wolverine’s system of adjustment that is quick and solid. Thick metal platform acts like a heat sink helping you keep your blade from over-heating. Increases the versatility of your grinder, this is one of the best grinding accessories you can own. Can be used with 6", 8" or 10" grinders. <iframe width="560" height="349" src="" frameborder="0" allowfullscreen="" data-mce-src="http://www.youtube.com/embed/n_dZNLr2cME?rel=0&hd=1">