CM is the original "Hammerlok®" manufacturer. The style has been copied all over the world and many refer to these Hammerloks as couplers, coupling links or connecting links. They are used on overhead lifting slings to connect chain legs to the master link and/or hook to attachments. Made from drop forged alloy steel, these links are dual rated--they can be used with Grade 100 or Grade 80 chain systems. What matters most is that you pair them with the proper chain size. Safety factor of 4:1. These links meets ASTM A952 standards. Made in the U.S.A.
DO NOT USE TO SPLICE CHAIN LEGS!