Movement hole (pinhole): Precision hole (rough hole) Material: Stainless steel, Plastic Color: Black Movement size: 5.6cm*5.6cm*1.6cm The total shaft length is 12mm and the thread length is 5mm. Package includes: 1x Clock movement DIY Repair Clock: Can be used to repair, replace the broken movement, or as a handmade tool, this movement only requires a 1.5V AA battery, (Note: does not include the battery). The time for the pinhole is 0.55 cm, the diameter of the minute hand is 0.35 cm and the diameter of the second hand is 0.1 cm. Steps to install 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 that the second hand does not scratch the glass to avoid time errors.