A cylinder with a small and clever addition that unmistakably improves the effectiveness of the cylinder against violent burglary with a Jafka patent pliers
 The groove is 0.5 mm thick and deep enough that on the one hand does not impair the function of the cylinder and on the other hand is the easiest breaking point of the cylinder
 As soon as you try to break the cylinder in order to break open the door
 The cylinder is broken but not in the ideal place to perform a break-in
 Hin obtainable in all sizes