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Master Lock 40 Stainless Steel Discus Padlock 1 Pack

Steve Opiyo
Created by Steve Opiyo
August 4, 2026

The Master Lock 40DPF Stainless Steel Discus Padlock is a robust security solution designed for both indoor and outdoor use. With its stainless steel construction and hardened steel shackle, it offers a high level of security, making it suitable for securing storage units, garages, sheds, and trailers. Compared to other products in its category, it stands out for its durability and resistance to picking and prying.

This padlock features a 4-pin cylinder and dual locking lever mechanism, which enhances its resistance to picking and prying. The shrouded design minimizes shackle exposure, protecting against bolt cutter attacks. These features position the Master Lock 40DPF as a strong contender in the market, especially for those seeking reliable security for their belongings.

In the box, you will find one padlock and two keys, which is standard for most padlocks in this category. The inclusion of two keys provides a backup option, which is always a plus for users.

Customer feedback for the Master Lock 40DPF is generally positive, with many users appreciating its sturdy build and security features. Compared to other products, it receives higher praise for its durability and resistance to weather conditions, making it a preferred choice for outdoor use.

When compared to the Master Lock 7804EURD Padlock Set, the 40DPF offers a more robust design with its stainless steel construction, whereas the 7804EURD focuses on weather resistance with its thermoplastic cover. Both products are well-received, but the 40DPF is favored for its security features.

In a side-by-side comparison with the H&S Snn243 Padlock, the Master Lock 40DPF offers a more compact design with a focus on security, while the H&S padlock provides additional keys and a larger size, catering to those who need multiple access points.

For those seeking a reliable and secure padlock for both indoor and outdoor use, the Master Lock 40DPF is a worthy recommendation. Its robust construction and security features make it ideal for users who prioritize durability and protection against tampering.

76
out of 100
Very good

Our AI read and summarized 3960 reviews to rate this product.

Pros
  • Stainless steel construction for durability
  • Hardened steel shackle for increased security
  • 4-pin cylinder for pick resistance
  • Dual locking lever mechanism for pry resistance
  • Shrouded design minimizes shackle exposure
Cons
  • Limited to two keys
  • May not fit all lock applications due to size
  • Higher price compared to some competitors