A tenon receiver, also known as a MORTISE, is a type of joint used in woodworking. It is created by cutting a rectangular hole into one piece of wood and then inserting a tongue-shaped piece of wood into the hole. The tongue-shaped piece is called a tenon and the hole is called a MORTISE. The two pieces are then secured together with glue or nails. The MORTISE and tenon joint is strong and durable, making it an ideal choice for furniture and other woodworking projects.