General Tools 870 Aluminum Mortise and Tenon Jig Kit ALL-IN-ONE SOLUTION- Provides a quick and easy way to cut both a matching mortise and tenon with a single jig DURABLE- Jig body made of solid aircraft grade aluminum ACCURATE- Integrated clamps and swing arms align and secure wood for accurate joints VERSATILE- Can easily handle wood stock ranging from 1/2-inch to 1 1/2-inch thicknesses and can cut multiple mortises in a single long piece INCLUDES- 1/4-inch high speed upcut spiral bit, bushing guides for 1/4-inch 3/8-inch and 1/2-inch tenons, two-part base plate/bushing adapter, centering tool and adjustment wrench