If you are using a T profile you will need one of these. I ordered both sizes plus mandrels for each. They cleanly cut through about 80 linear feet of MDF. They are high quality and you can't beat the price.
Whiteside 6700A Slotting Cutter with 16Bore
3 Review
Bosch 1608132006 Rabbeting Depth Planers
4 Review
πͺ Precision Slotting Cutter Assembly by Amana Tool: Achieve Clean and Accurate Cuts
Yakamoz Woodworking Drilling Bits - Increased Degree and Diameter
πͺ DEWALT DW3984C Portable Blade Set of 3-Pack
10 Review
Chest freezer Biryusa 155KX, white
16 Review
πͺ Bi-Metal Cutting Blades: Imachinist S933414 - Enhancing Precision and Performance
Olson 80 Inch Blade FB14580DB-025