3 Eye Chrono: 1/10th Seconds at 2, Seconds at 6, 30 Minutes at 10. Perfect for repairing, replacing or making clocks. Watch Balances Wheels Tack Holder Watchmakers Tool Watch Repairing Accessory. Hand sizes: 90/150/25 (Hole: 0.90mm Minute/1.50mm Hour, 0.25mm SS).
