TYPES OF SCREW HEADS NO FURTHER A MYSTERY

Tamper Resistant Hex- Tamper-resistant hex drives are tamper resistant with a small pin in the middle of the drive. A Exclusive Device is needed to remove these screws.  Pancake: Pancake head screws are distinguished by their round, very low-profile heads, which make them the ideal option for fastening panel clips to Wooden, Panel Clip screws,