ISAK-RG 4 - master link with 4 all direction, movable welded IRG connectors. Thus ensuring that only the correct chain diameter and number of legs can be connected. ICE-Master link is marked by the RUD-ID-TAG (RFID chip) and with the clear identification number distinguished. Complete identification tag with an integrated testing gauge. Pre-assembled connecting bolt and tensioning sleeve. Manufactured in compliance with DIN EN 1677-4. Owing to a larger gradation of the inner width >> B of the ISAK-RG, improper use (BGR 500/DGUV-Regel 100-500, Kap. 2.8) is almost eliminated and wear of the crane hook is minimised. Additional connective components for over size hooks are not necessary. ISAK-RG - size B = 140 suitable for hooks up to no 16. DIN 15401.