Durable, lightweight, non-conductive Xenoy ®* Lock body. Customize on-site with permanent, write-on labels. Compliance with OSHA "one employee, one lock, one hey" directive. High security, reserved-for-safety cylinder - over 100,000 key changes. Key retaining - ensures that padlocks are not left unlocked. Photo I.D. labels, laser engraving and key charting services available.