Amana Tool 45580 Carbide Tipped Mortising 1-1/4 D x 1/24 CH x 1/2 Inch SHK Router Bit
Intended for hinge mortising, this bit is an excellent choice for cutting laps and tenons as well. The sides and bottom of the cut are exceptionally smooth.
The down-shear design reduces chipping along the top edge of the cut, especially in laminates and veneered plywood and MDF.
The large gullet between the cutting edges provides excellent chip clearance.