Seiko-skp Quartz Movement for Clocks. The quartz movement features accurate and dependability timekeeper (accurate to +/- one second per day), movement size: 2 7/32" square 1/2" thick and fits in a 3" diameter hole. Movement is suitable for clock repair, restoration or clock making. The shaft diameter measures: 5/16". A pair of hands included 5 1/4" as shown. AA battery required. Clock movement: Maximum Dial Thickness 1/2" & Total Hand Shaft Length 7/8" Japanese Engineering and Quality Made in China.