Power Cordz™ utilize a synthetic fiber called Zylon HM or PBO. It’s stronger than steel and twice as strong as Kevlar. PBO is a rigid-rod isotropic crystal polymer that has superior tensile strength and modulus of elasticity. Simply stated - Zylon is very stiff and strong, it’s superior cable material. A slick nylon protective coating encases around 10,000 PBO fibers. The cord is then bonded (using a top-secret patented process) to a high quality anodized anchor. The bond has a breaking strength of over 600lbs which is the same as steel at 25% the weight of steel.