4-digits Dual-Mechanism Computer Security Lock for Notebook

1. Material :
   锁头 : zinic alloy lock ( with 精密铸造 way )
   ( Precision casting can increase the hardness of 锌合金 and not easy to be broken ) 
   缆线 : 聚氯乙烯图层电缆线
2. 尺寸大小 : 
   锁头 : 57 x 14 x 34 mm
   缆线 : 6 mm x 180 cm
   
3. Advantage : 
   4-digits is stronger than 3-digits 
   Precision casting would increase hardness of lock and increase protected ability 
   Dual-mechanism : 4-digits combination and override key for emergency opening ( e.g. eliminate the risk of forgotten combinations.) 
   
4. Override key function :
   If users forget their own combination, the lock will be unlocked without damaging notebook / laptop.
5. Only use attached override key to unlock when users have forgotten their personal combination.