The new adaptions to the patented locking mechanism allow for easier locking, which can be confirmed by the distinct ‘clicking’ sound made when properly locked. One-sided locking of the buckle is essentially impossible. The COBRA® PRO STYLE 18 kN distinguishes itself by the high flexibility between the male and female parts while the buckle is closed. All COBRA® PRO STYLE 18 kN buckles are compatible. The COBRA® PRO STYLE 18 kN is thicker and even stronger than the COBRA® PRO STYLE and complies with the ANSI Z359.12-2019 standard with a minimum tensile strength of 15 kN. However, we guarantee 18 kN and point this out in the technical specifications accordingly. Features: Both clips need to be pressed at the same time to open the COBRA®. One-sided release by pressing only one clip is near.