Amana Tool 53610 3-wing Box Joint Set w/Ball Bearing Guide.
Amana 53610 Specifications:
Amana Box Joint set containing 3-wing slotting cutters and spacers for producing jewelry boxes, drawers, etc. Complete with cutters, spacers, arbor, and ball bearing to achieve 1/2" depth of cut. Recommended stock thickness 3/4" through 1-5/8". For materials over 1-5/8", two passes will accomplish joints up to 3".