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 ...
A chisel is one of the most utilitarian and oldest hand tools for woodworking. And a good wood chisel, in particular, has sharp beveled cutting edges, holds those edges well, sharpens easily, and ...