An apparatus to guide a saw to make miter joints.

A miter box is a saw guide that lets you make accurate cuts at a variety of angles. Simple wooden miter boxes have slotted saw guides at 90- and 45-degree angles. More elaborate metal miter boxes are adjustable to cut at any angle and often include a miter saw. Home Improvement Encyclopedia

A hand tool for guiding handsaws in making crosscuts or miter joints

A hardwood open-topped square box with precut cut lines to guide angled or square saw cuts.

The device used to guide the saw to cut wood at an angle for a miter box.