Cylinders & Key Systems With over 60 years' experience of designing and supplying cylinders and keys throughout the world, ASSA is established as the first choice for high security, robust and sophisticated key systems. Downloads Cylinder and Key Systems (.pdf, 120 kB) Cylinders & Padlocks (.pdf, 588 kB) Cylinders & Key Systems Information (.pdf, 889 kB) ASSA dp4400Patented keys and mechanism for maximum protection against unauthorised duplication Six pin tumblers plus force-controlled sidebar with false gate position High physical security: hardened steel... ASSA dp2400The ASSA dp2400 system is fully compatible with dp4400 very high security cylinders, allowing for the creation of dual security master key systems. The range features a 6-pin tumbler plus patented... ASSA Twin Combi 5800Patented keys and mechanism with Code Level 7 giving maximum protection against unauthorised duplication Six pin tumblers plus sidebar mechanism giving full resistance against all known methods of... ASSA 4800Patented keys and mechanism for maximum protection against unauthorised duplication Six pin tumblers incorporating anti-picking features High security: hardened steel inserts for drill resistance... ASSA P600Profile of the key - paracentric to prevent picking and extended keyneck to allow the use of security accessories Pins - special security pins with wings and 2 tips per pin for enhanced securit... ASSA Flexcore PlusPatented keys and mechanism for maximum protection against unauthorised duplication Five pin tumblers incorporating anti-picking features Medium security Heavy duty keys made from hard-wearing nick...