Walnut Hollow Clock Movement are Quartz clock movements that offer watchmaker's accuracy and dependability. These are suitable for repair or restoration of all kinds of clocks. Or you can create your own unique timekeeper. 3/4 inch Clock Movement with second hand fits a 3/4 inch thick surface. 5/16 inch shaft diameter. 27/32 inch threaded shaft length. 1 3/16 inch overall shaft length. Gold Clock Hands. Uses 1 AA Battery (not included).