Sold Secure Diamond Grade represents the toughest security standard on the market. ProSecure enhanced security cylinders are designed to withstand all common methods of attack, making them the most secure option available. Manufactured from brass and hardened carbon steel, these cylinders incorporate intelligent security features for maximum protection.

They include a unique sacrificial point for snap secure protection, while a high-strength carbon steel block resists snapping and deplugging, safeguarding the cam from manipulation. Each cylinder also features a unique registration code, laser etched for key copy control.

Tested and approved by the Master Locksmith Association (MLA), these cylinders meet the stringent requirements of the Sold Secure Diamond Grade. They are also Police Preferred Specification, Secured by Design approved, and hold the British Standards Institute (BSI) 3 Star Kitemarked.