How to add counterbore for slot cut extrude feature like hole

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The Amana 55232 COUNTERBORE SCREW SLOT BIT 12 is at BallewSaw, Where we beat ANY advertised price  As we saw earlier, slots allow us to avoid overconstraint while having greater precision An example of this can be seen in Figure 3 Round Slot GDT Figure 3

bagedysten slot Preamer 5pcs M3-M8 Pilot Slotting Counterbore Mould End Mill Cutter Solid Slot Countersink End Mill Drill Bit : : Industrial & Scientific  Is there a direct function to create a counterbore slot to retain a hex headed set bolt?ff