Grade 30 Proof Coil is made from low carbon steel and is a general utility chain for such uses as farm, log chain and tow and switch chain. G30 chain come in both long link (made to NACM specʼs) and short link (made to ASTM 80 specʼs). Long Link chain has a longer inside length to save weight and reduce cost. Both long and short link chain have the same strength ratings. Generally short link chains are more flexible than long link chains, both chains serve their purposes well.
The proof coil chain can not be used for over head lifting and highway truck transportation.