Abstract: A miter attachment capable of use on radial saws, table saws, drill presses, router tables, and the like, comprises three legs of a triangle. The longest leg constitutes an elongated base member. This base member is pivotally attached at one end to a fence member. The base member has a track in it for engagement by a slider, which is capable of movement along at least a portion of the length of the base member. The slider is pivotally attached to one end of a coupler arm, the other end of which is pivotally attached to the fence member at a point spaced from the end pivotally attached to the base member. As the slider is moved to different relative positions along the length of the base member, the coupler arm causes the angle between the fence and the base member to change.