Professional locksmiths and safe technicians use borescopes to read wafer locks (wafer reading scope), look into safe and vault (safe opening scope), and study inside locking mechanism. 

Normally a smaller diameter borescope is good for locksmith technicians for easy access to smaller openings. There are two types of borescopes for professional locksmiths and safecrackers:
  • Rigid 
  • Flexible / Semi-Rigid
For each type, there are two variations: articulating or non-articulation. For articulation type, one can steer probe tip camera to different angles, while for non-articulation probe, usually a side-viewing mirror or another side-viewing camera is needed.  ​