Shaper Cutter - 3/8" Rabbeting, 3/4" Bore at Grizzly.com
Freud UC-209 2+2 Raised Panel Shaper Cutter For 3/4 inch Stock - 3/4 Bore
Amana Tool SC557 2-PC Carbide Tipped 3-Wing Stile & Rail Tongue & Groove Cabinet Door 3-1/4 D x 1-3/4 CH x 1 & 1-1/4 Bore Shaper Cutter Set for 3/4 to 1-3/4 Material