The Grade 80 shortening devices TWN 0896 for fixed size master links are used in chain slings and enable the lengths of the legs to be adapted to the conditions of use.
The manufacturing and testing requirements are based on DIN EN 818-4 and comply with the ASTM A906/A906M-02, ASTM 952/A952A, ISO 8539, DIN EN 1677 parts 1 and 4 and DIN 5688-3.