Movement Hole (pinhole): Precision Hole (coarse hole) Material: Stainless Steel, Plastic Color: Black Movement Size: 5.6 cm × 5.6 cm × 1.6 cm Total Shaft Length: 12 mm; Thread Length: 5 mm Package Includes: 1 × Watch Movement DIY Repair Clock: This watch movement can be used to repair or replace a broken clock movement, or for handmade clock projects. It operates on a single 1.5 V AA battery (battery not included). Hand Hole Diameter: 0.55 cm Minute Hand Hole Diameter: 0.35 cm Second Hand Hole Diameter: 0.1 cm Installation Steps: 1. Install the hour hand first. 2. Install the minute hand next. 3. Install the second hand last. All hands must be aligned at the 12 o’clock position. Ensure hands remain parallel and do not rub against each other. Note: Ensure the second hand does not touch the glass surface to maintain accurate timekeeping.