What is a keyhole router bit used for

What is a keyhole router bit used for keyhole slot bit 38 x 14 Shank Straight Keyhole Professional Router Bit Recyclable Exchangeable Slot Cutter Professional Router Bit Professional $ USD · View Details keyhole slot hanger CMT 850 Keyhole Bit and T-Slot Bit

keyhole slot hanger Carbide Tipped Keyhole 38 Dia x 38 x 14 Inch Shank Form keyhole slots in plaques, picture frames, and other wall-hanging items with this plunge-cutting

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