Master locks 406 dielectric xenoy safety padlock with plastic shackle helps prevent electrocution and arc flashing, also prevents electrical current from shackle to key. All components are non-sparking and non-magnetic - plastic, copper, brass. Designed exclusively for lockout/tagout applications. Durable, lightweight, non-conductive xenoy lock body. Compliance with osha ";one employee, one lock, one key"; directive. Key retaining-ensures that padlock is not left unlocked. Keyed different with a 1-1/2" wide 1-3/4" tall xenoy purple body, plastic shackle with 1-1/2" clearance. keyed different 6-pin tumbler cylinder