Abstract: A device which is attachable to the mast of a forklift for indicating to the forklift operator the tilt angle of the mast in a vertical plane centered on the forklift includes a pivotably supported weighted pendulum, and an elongated activating arm secured to the upper extremity of the pendulum. The activating arm operates a component that is slideably mounted to a base plate, and carries an indicating pointer. A cover member fits over the base plate, and contains a window which accommodates the pointer. Indicia on the cover member interact with the pointer to show the tilt angle of the mast.