DMM Impact Block Eye Protection prevent the core from being

prevent the core from being cut or melted completely

while using the opposite side to run your lanyard if moving it off of your side d's

Better security and tensile strength based on even load distribution onto whole of tube shape ring structure

They are labeled with Minimum Break Strengths and marked with Serial Numbers

DMM Impact Block Eye Protection prevent the core from beingDMM Impact Blocks Designed for use in the tree care industry when loads may be dropped into rigging with considerable impact forces. The combination of high quality materials and advanced production processes has ensured a rope friendly, durable and robust product. During design each Impact Block has gone through a thorough dynamic and static testing regime, the end result is a highly functional product with an impressive strength to weight ratio.