Operating Principles /Abloy/AbloyGlobal/ABLOY%20USA/Abloy%20technology/Abloy_Tech_OperatingPrinciple.jpg All ABLOY® locks are based on the unique operating principle of rotating detainer discs, regarded by experts as a more secure system then pin-based locks. Inside the ABLOY cylinder, a series of discs rotate and function like those in a safe. Only the correct key, turned 90 degrees, will rotate the discs aligning the side bar gates. After the discs are aligned to the correct opening combination, the locking bar drops into the aligned slot allowing the lock to open. To withdraw the key it must be turned in the reverse direction until it stops. This will mechanically scramble the discs.