Dhorcas Quartz Clock Movement Kit for Replacement, 3/4" Threaded Motor and Long 6" Hands Quiet, Travel Time Accurate Threaded shaft length: 19.5mm / 3/4in. Precise Degree is High Total shaft length: 28mm / 1 1/16in. Motor size: 2 2/16" x 2 2/16" x 5/8"