The “mortise” is the recess where the tenon goes. It can be cut by hand with a mallet and mortising chisel, or mechanically with a mortising machine and a hollow chisel bit. If you don’t have those ...

Twist drill A standard drill bit with two twisted, fluted cutting edges to remove material Wood Flat drill Has a flat face, a pin at the bottom, and two cutting edges. Allows for a flat blind hole ...