The Complete Pocket-Hole Kit for Building DIY Wood Projects The Kreg® Pocket-Hole Jig 320 makes it easier than ever to build DIY wood projects—whether you’re building your first DIY project, or you’ve been working with wood for years. The Pocket-Hole Jig 320 works with materials from 13mm to 38mm thick. It features two drill guides, a removable spacer, and thickness stops for 13mm, 19mm, and 38mm material that give the versatility you need to build with boards and plywood found in home centers.