The Master Lock 406BLU Padlock features a 38mm wide Zenex red body and a 38mm tall, 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.