Abstract: Snap-on holders adapted to be attached to a head portion of a machine for supporting an indicator include a body member composed of a stiff resilient plastic material and having a pair of spaced-apart prongs adapted to spread apart and to snap into snug-gripping engagement with the head portion of the machine to be supported by and to extend therefrom. The prongs of the body member have a generally semi-circular arcuate surface extending for more than 180.degree. to contact the head portion of the machine through a continuous line of engagement. The body member has a portion extending laterally from the prongs, and an aperture therein is adapted to receive rotatably therein for supporting purposes the indicator. A second snap-on holder is received in snug-gripping engagement with the prongs and is held in place by the head portion of the machine.