the barrel of the drum face enables accurate key guidance
the incision on the bobbin transfers the torque from the key fin to the bobbin, increasing the resistance of the wrench to tipping
paracentric key profile (the profile line permeates the central axis of the profile three times within the pulser) and the special design of the valves prevents the manipulation of picks and PICK devices
high-class anti-piercing protection in the body and in the drums
the cross-cut body protects the insert against breaking in the point of attachment (the insert breaks at the incision site - applies to WBG 6)