Hide Design: The heavy duty puck lock features an advanced design that effectively hides and protects the lock core, making it more difficult to pry and break, preventing theft and vandalism. 2、Intrusion Prevention: Designed to provide the highest level of security, puck lock has prying, drill and file resistant features effectively prevents intruders from forcing their way into boats, trucks or other containers loaded with goods. Durable Construction: Manufactured with alloy steel material, this hidden shackle padlock is built to last. Its sturdy construction and weather resistant design make it suitable for outdoor use. Wide Application: These padlocks can be effectively used for a wide range of applications, such as trailer, warehouse, container, and commercial buildings, providing reliable protection wherever needed. Simple and Efficient: Despite its complex design, the hidden shackle padlocks are a easy to use and offer a trouble free locking mechanism that's efficient and user