A Miter saw, also known as a Miter saw, is a saw used to precisely cut miters and crosscuts into a workpiece by mounting the blade onto a board. The current version of a Miter saw is a motorized circular saw that can be angled at different angles and is dropped onto a board that is placed against a backstop known as the fence. The original Miter saw was made up of a rear saw in a miter box.