Inbuilt workpiece thickness gauge - for rapid checking of material dimensions. set up gauge for rapid drilling of joints - no marking out required. drill depth setting gauge - fast operation. DIYers and expert craftsmen turn to this jig kit to build their woodworking projects. First, use the jig to drill steeply pitched counter bores in one joint member; then, drive self-tapping screws (without pilot holes) into the other member. This jig creates flush, corner and angle pocket hole joints for leg-and-rail connections, building face frame cabinets, sneaking screws into tight spots, and fastening picture frames with unlimited applications.