The AD-15 model is based on a patented original by American knife maker Andrew Demko, who has developed countless models for Cold Steel and is also the author of the patented Tri-Ad Lock™, the safest back lock of all time. The new AD-15 knife allows opening and closing with one hand. The Spear Point blade shape with a pronounced blade spine and hollow ground edge provides the knife with exceptional cutting performance. The uniqueness and exceptionality of this factory-made AD-15 knife lies above all in Andrew's new locking patent, the "Scorpion Lock". The lower part of the handle is made from 3D machined G-10 material reinforced with steel inserts, whilst the upper part of the handle, called the "yoke", is made from 3D machined aluminium 6061. This yoke is wedged against a safety pin when the knife is opened and is pulled against it by a strong pressure spring. To open the knife, simply push your thumb on the pin and watch as the yoke deflects upwards from its axis until the safety pin engages in a deep notch. Thanks to the constant pressure of the spring and your hand, the Scorpion lock is practically resistant to failure. Conversely, when closing the knife, your fingers lift the yoke to release the blade for closing. The blade is made from CPM-S5VN steel. This exceptional American steel is not only very strong and durable, but can achieve excellent sharpness and the blade then has a long service life. A very fine-grained powder steel with uniform microstructure offers very stable properties. It is resistant even with a very fine blade bevel, reliable and highly corrosion-resistant. It is a good choice for high-quality custom knives and tools. The CPM (pseudo-powder metallurgy) process guarantees a very homogeneous, high-quality steel structure, dimensional stability, good sharpening capability and strength compared to steels made by conventional methods. Despite lower chromium content, this steel exhibits very good results in terms of corrosion resistance.

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