THE MASTER LOCK 411 SERIES ZENEX LOCKOUT/TAGOUT PADLOCK HAS A NONCONDUCTIVE BODY THAT FUNCTIONS IN TEMPERATURES FROM -70 TO 350 DEGREES F; RETAINS ITS KEY UNTIL LOCKED TO ENSURE IT IS NOT LEFT UNLOCKED; AND HAS A KEYED DIFFERENT 6-PIN TUMBLER CYLINDER FOR SECURITY (OVER 40000 KEY CODES). ""PROPERTY OF"" LABELS WITH BLANK LINES FOR CUSTOMIZATION AND ""DANGER LOCKED OUT DO NOT REMOVE"" LABELS IN ENGLISH/FRENCH AND ENGLISH/SPANISH ARE INCLUDED. THIS PADLOCK IS PART OF A LOCKOUT/TAGOUT (LOTO) SAFETY PROCEDURE REQUIRED AT FACILITIES WHERE A DEVICE OR ENERGY SOURCE NEEDS TO BE ISOLATED DURING MAINTENANCE AND REPAIR.