
Andrew Demko has been a prominent figure in the knife industry for many years, with several of the most popular Cold Steel knives being his creations. Notably, the Cold Steel AD-10, a production version of his custom knife, holds a special place in the hearts of enthusiasts. In recent times, Demko Knives introduced the innovative Shark-Lock, causing quite a stir in the knife world. Let’s delve into what sets the Shark-Lock apart and why it’s gaining so much attention.
Understanding the Shark-Lock

The Shark-Lock is a unique spine-actuated locking mechanism designed for folding knives. Its standout feature is the spine protrusion reminiscent of a shark’s fin, giving it its name. Not all spine-actuated locks are the same as the Shark-Lock, boasting significant differences in its internal mechanics which contribute to its exceptional performance.
Strength and Durability of the Shark-Lock
In terms of strength, the Shark-Lock is incredibly robust. Comparing its resilience to other locks, the Shark-Lock stands out as exceptionally sturdy and capable of withstanding substantial force. The lock’s design ensures a level of strength that surpasses what most users would ever subject it to, making it a reliable choice for long-term use.
Andrew Demko puts his knives through rigorous tests, demonstrating their durability and toughness. For instance, the AD20.5 endured an astounding 875 inch-pounds of torque before showing signs of stress, highlighting the lock’s exceptional endurance and reliability.
Shark-Lock versus Tri-Ad Lock
While the Tri-Ad Lock, another creation by Andrew Demko, is recognized as one of the strongest knife locks available, the Shark-Lock offers a comparable level of strength while providing a smoother, one-hand-operable functionality. The Shark-Lock’s unique design, with a strategically positioned locking pin, enhances its durability and reliability, making it an excellent choice for various knife applications.
Knives Featuring the Shark-Lock
Initially introduced in Demko custom AD20 models, the Shark-Lock has now found its way into the Taiwanese-made Demko AD20.5 and Shark Cub knives. These knives retain the strength and resilience of the original design but in a more compact and pocket-friendly form factor. Additionally, the Flytanium Arcade is another knife equipped with the Shark-Lock, offering customization options without compromising on strength or usability.
Uniqueness of the Shark-Lock
While the Shark Lock may bear some resemblance to other spine-actuated locks like the SuperLock and Atlas Lock, it incorporates distinct features that set it apart. The Shark-Lock’s innovative design and functionality make it a standout choice among knife enthusiasts seeking a blend of strength and ease of use.
Benefits of Choosing a Shark-Lock
When considering a knife with a Shark-Lock mechanism, you’re not only investing in exceptional strength and durability but also in a user-friendly and engaging operational experience. The Shark-Lock’s blend of robust construction and smooth operation makes it a compelling choice for everyday carry and demanding tasks where reliability is paramount.