【MORTISING ATTACHMENT FOR HAND DRILL / DRLL PRESS】- The Square Hole Drill Bit Adapter is suitable for both drill press and hand drill with a clamp diameter between 38 to 55mm/1.5 to 2.2 inch. 【Bench ...

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 ...