8″ x 20T Box Joint Cutter Set. Set includes 2 blades, instructions for making box joints and building a box joint jig. . Does not need dado set or saw blade. Features Premium Tico™ HI-Density Carbide Crosscutting Blend for Maximum Performance. Silver I. C. E. Coating prevents build up on the blade surface and keeps the blade running cooler and cleaner. All blades and chippers come with Freud’s anti-kickback design.