Dhorcas (#20) 1/4" Threaded Motor and Straight Black 10" Hands, Quartz Clock Movement Kit and Replacement Motor FAST SHIPPING... get it in 2-4 business day Total shaft length: 13mm / 1/2in. Motor size: 2 2/16" x 2 2/16" x 5/8" IMPORTNAT: Please measure the thickness of your dial to see if this shaft length will work. Threaded shaft length: 1/4". For dials up to 3/16" thick Quiet, smooth sweep second hand motion. Precise degree is high