High quality reversible key system with multi-row pin arrangement Cylinder series 45 janus was developed at a very sophisticated technical level. Among other applications, it is used in complex locking suites which have to meet the highest demands on security. But also in private residential construction, cylinders with registered differ of this series are used. Technical description Reversible key technology; cylinders in ¾sandwich design “, variable in length, for regis-tered differ, keyed alike locking and suited applications with security card, with 4 rows of pins, steel tie bar, cover cap in satin or polished nickel plated brass or in chrome nickel steel, with3 keys (for suited applications key quantity on request), without escutcheons, with nickel plated steel fixing screw M5 x 80 mm. Options Emergency function: Optional from BL 31/31 on both sides, from BL 27/31 on one side. The emergency function on double cylinders allows the cylinder to be operated even if a key is inserted on the other side of the cylinder. Drill and withdrawal protection: Certificated drill and withdrawal protection BZWC (hardened steel plug disk, body reinforcement and body locking pin) optional for both sides of cylinder. Outside cylinder with plug protection disc of hardened steel and additional hard metal anti-drill pin in the body (drill and withdrawal protection BZWB). As standard for profile cylinders for registered differ, optional for suites. VdS approval: Double, half and knob cylinders with VdS certification available on request.(VdS = Association of German property insurers) SKG approval: Double, half and knob cylinders with SKG certification available on request. For details concerning the particular security classes and further performance features,please see our ¾Performance Catalogue ‚¬â€œ Locking cylinders “.