Schlage 999478 High Security Chain with Cinch Ring Cinch Chain | 5' Cinch Ring Security Chain 5' chain has 1/2" triple heat-treated manganese steel links This security chain is designed for use in high risk locations Resists attacks from bolt cutters, saws, hammers and chisels Cinch ring design for more usable length and ease of use with Schrage high security padlocks