The Master Lock No. 406RED Dielectric Thermoplastic Safety Padlock features a 1-1/2in (38mm) wide Zenex™ Thermoplastic red body and a 1-1/2in (38mm) tall, 1/4in (6mm) diameter plastic shackle to help prevent electrocution and arc flashing and to prevent electrical current from shackle to key. All components are non-sparking and non-magnetic. Designed exclusively for Lockout/Tagout applications, the durable, lightweight material is easy to carry and padlock has key retaining cylinder to ensure the padlock is not left unlocked. Body Width: 1-1/2" Shackle Inside Height: 1-1/2" Shackle Inside Width: 25/32" Shackle Diameter: 1/4" Plastic shackle helps prevent electrocution and arc flashing, also prevents electrical current from shackle to key All components are non-sparking and non-magnetic - plastic, copper, brass Designed exclusively for lockout tagout applications Durable, lightweight, non-conductive Thermoplastic lock body Compliance with "One Employee, One Lock, One Key" directive directive Key retaining - ensures that padlock is not left unlocked Keyed different, 6-pin tumbler with over 40,000 available key changes cylinder