Designed exclusively for lockout/tagout applications. Features 1/4" dia. metal shackle. The Zenex thermoplastic lock body provides durability while still being lightweight. Padlock features a reserved-for-safety, key retaining cylinder to ensure padlock is not accidentally left unlocked. Each padlock has a keyed-alike or keyed-different, 6-pin cylinder to reduce risk of key duplication within key system. Cylinder features over 40,000 key changes. Includes (1) key to comply with the "one employee, one lock, one key" industry guideline. Available in red, yellow, green, blue, orange, black, teal and purple.