{i} mortise, recess or groove in a piece of wood or another material that fits together with a corresponding projecting piece of material; connection, joint
Machining and reinforcing a preparation into door or frame for attachment of hardware With our frame we do not machine our preparations, we use a process called embossing
A rectangular hole or slot cut into wood that will receive another member (called a tenon) to make a right-angle joint, or to receive ironmongery such as a lock
A rectangular slot that has been cut into a piece of wood that another piece of wood is to be inserted into to form a locking joint A cutout for hinges or door strikes