The General Tools E-Z Pro Mortise & Tenon Jig Kit can create professional-quality mortise-and-tenon joints. Unique design cuts matching mortises and tenons. Can cut multiple mortises in a single long piece. Mortise & tenon thickness: 1/4 to 1/2 in. Mortise & tenon wdith: 1 to 3 in. Stock thickness: 1/2 to 1-1/2 in. Includes: Jig, #870B Router Bit, Bushing Kit and allen wrench.