The examination of keys (for locks and profile cylinders on the premises as well as keys for other security devices and for vehicles) serves to ascertain whether duplicate keys were made.
Gauge marks indicate that a key was duplicated with a mechanical profile-milling machine. There follows an assessment of the further use of those keys, drawing on the results of serial examinations, experience and input from third parties. On occasion, an EDX system may be used for material analysis, to determine any materials transferred to the key during use.
Initially, the integrity of a set of keys is checked against our comprehensive in-house database. Next, production marks and cuts are compared with those of the manufacturer, and it is determined whether the keys are originals or duplicates.
Keys are also examined for evidence of having been used as sample keys for producing cast duplicates. Any foreign materials transferred are subjected to EDX or infrared analysis. The keys are tested to establish whether they were cut using an electronic or laser-driven profile-milling machine using a non-contact scanner.
All observations gained from these examinations are included in the inspection records and dealt with under the four-eye-principle.