The Master Lock Safety Keyed Padlock MLK410RED is a durable and nonconductive padlock that is light and easy to carry. It features a 6-pin tumbler cylinder that is keyed differently for added security. The key retaining feature ensures that the padlock is not left unlocked, providing peace of mind. This padlock is labeled with "Danger. Locked Out. Do Not Remove." and has a shackle size of 0.25" diameter.