Designed exclusively for lockout/tagout. Durable, lightweight, non-conductive body is easy to carry. Special thermoplastic body offers superior performance against chemicals, moisture, temperature and UV. Reserved-for-safety cylinder provides over 40,000 unique key changes available. Key retaining - ensures that padlocks are not left unlocked , cannot remove key until shackle is closed. Includes write-on "Danger? and "Property of? labels in English, French and Spanish. Locks comes with one key: Compliance with OSHA "one employee, one lock, one key? directive. Body Length: 1-3/4?. Shipping Weight: 0.23 lbs. Body Height: 1-3/4?.