The reversible key is extremely difficult to copy. The code on the key is not made by drilling but by using a special type of milling which conceals the exact dimensions of the code on the key. There are also millings made on the edge positions.This gives additional security against unauthorized key duplications.
The system can have up to 22 pairs of pins per cylinder side. Resistance against picking is achieved by using especially designed pin tumblers. The lengths of the pairs of pins are always identical - this gives the highest level of anti-picking protection. Each of the up to 22 pairs of pins can be variade up to 4 steps. The four rows of pins are radial positioned and can be fully variade to give an unlimited amount of variations.