Keyhole Router Bits - Tooling

I recently snagged the Rockler T Slot bit when it was on sale I've used it to slot both 34 Oak Plywood and MDF both are holding up fine

Keyhole Router Bits deliver high cutting performance for routing keyhole joints; Used for routing mounting slots in picture frames, plaques and other wall

keyhole slot hanger  Drill the hole to size to fit the major diameter of your cutter Now do a slot in two

keyhole slot bit Use these to cut the hanging slots on the backs of awards and photo frames Makes a good slot Really don't know about or need a high degree of longevity