Creates beautiful decorative mitered joints and also strengthen mitered corners on boxes drawers and more Once set the jig can be easily moved and re-clamped to drill the next hole clamps sold separately Precisely molded reference lines and clear alignment window for fast accurate setups Includes 1/8'' 1/4'' and 3/8'' drill guide assemblies. Our Corner Key Doweling Jig lets you join mitered corners by running dowels through the joint at 45#176;. The exposed oval dowel 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. No other product on the market offers the same functionality repeatability and convenience. Extended length bits are required.