The Bim-Bam Mechanical Strike Quartz Clock Movement is a chiming quartz movement that strikes out the two-note Bim-Bam melody on the hour. This mechanical strike mechanism is made up of two finely tuned copper rods mounted in a cast iron block. A convenient chime silencer shuts off the chime. Can be operated with or without a pendulum. The pendulum rod adjusts to 15-1/8" and the hook is 7/8" from the movement's front. The compact size of this mechanical strike movement allows it to fit into smaller schoolhouse or mantel cases.