Rockler Woodworking Wood Dowel Jig: Our drill guide for straight holes lets you join mitered corners by running dowels through the joint at 45°. The exposed oval dowel jigs woodworking ends result in a unique decorative effect, and the dowels serve to strengthen the joint, much like splines. You can use solid wood dowels in a contrasting species, non-ferrous metal tubes, a combination of both, or even tie the joint together with leather laces. More advanced decorative effects can be achieved by double-drilling to create dowels with a multi-layered core. The jig makes the angled drilling accurate and easy. --- Dowel Drill Jig Features: Rockler jig woodworking creates beautiful, decorative mitered joints, and also strengthen mitered corners on boxes, drawers and more - Once set, the drill guide jig can be easily moved and re-clamped to drill the next hole (clamps sold separately) – Doweling jig with precisely molded reference lines and clear alignment window for fast, accurate setups - Includes 1/8'', 1/4'' and 3/8'' drill guide assemblies. --- Joinery Jig Tech Specifications: Jig Material: Polymer - Drill Guide Material: Steel - Drill Guide Sizes: 1/8'', 1/4'', 3/8'' - Recommended Drill Bit Length: 6''.