The Master Lock No. 410BLU Zenex Thermoplastic Safety Padlock features a 1-1/2in (38mm) wide plastic blue body and a 1-1/2in (38mm) tall, 1/4in (6mm) diameter metal shackle. Designed exclusively for Lockout/Tagout applications, the durable, lightweight, non-conductive lock body is easy to carry and padlock features high security, reserved-for-safety cylinder with key retaining, to ensure padlock is not left unlocked.