Movement Hole (pinhole): Precision Hole (coarse hole) Material: Stainless Steel, Plastic Colour: Black Movement Size: 5.6cm*5.6cm*1.6cm The Total Shaft Length is 12mm and the Thread Length is 5mm. Packing included: 1x Watch Movement DIY Repair Clock: Can be used to repair, replace the broken clock movement, or as a hand-made tool, this watch movement only requires a 1.5V AA battery, (note: does not contain the battery). The time of the needle hole is 0.55cm, the diameter of the minute hand is 0.35cm, and the diameter of the second hand is 0.1cm. Steps for installing the hands: The first step is to install the hour hand. The second part is to install the minute hand. The third part is to install the second hand, the hands are all aligned at 12 o'clock, and the pointer should be kept parallel and not rubbed. Pay special attention to the fact that the second hand does not scratch the glass to avoid time errors.