The Spyderco Tenacious CPM S35VN folding knife with a SpyderEdge, model C122PSBL, exemplifies Spyderco's commitment to creating functional, durable, and innovative knives. This particular model boasts a blade made from CPM S35VN steel, a premium-grade material known for its excellent edge retention and corrosion resistance. This high-quality steel ensures that the Tenacious remains sharp over extended periods, even through rigorous use, making it a reliable tool for a wide array of cutting tasks.

One of the key features of this knife is its SpyderEdge blade. Spyderco's SpyderEdge is a type of serrated edge designed to enhance cutting efficiency, particularly on tough or fibrous materials. The serrations allow for a more aggressive cutting action, making it easier to saw through ropes, cardboard, and other challenging materials.

Ergonomics are a significant focus in Spyderco knives, and the Tenacious lives up to this standard. The handle is meticulously designed to fit comfortably in the hand, providing a secure and stable grip. This ergonomic design is particularly beneficial during prolonged use, as it helps to minimize hand fatigue and enhance the user's control over the knife.

Despite its robust capabilities, the Tenacious is crafted to be compact and convenient for everyday carry. It strikes a balance between being sufficiently large to handle a variety of tasks, from simple household chores to more demanding outdoor activities, while still being small enough to carry comfortably in a pocket or bag.

The knife includes distinctive Spyderco features, such as the round hole in the blade, which allows for easy and quick one-handed opening. Additionally, the Tenacious comes equipped with a functional pocket clip, making it convenient to carry and easily accessible when needed.
The C122PSBL model of the Tenacious stands out with its striking blue handle, adding a unique visual appeal to the knife. This not only enhances its aesthetic value but also makes it easy to locate in a toolbox, drawer, or when outdoors.

In conclusion, the Spyderco Tenacious CPM S35VN folding knife with a SpyderEdge, model C122PSBL, is an outstanding tool that combines top-quality materials, innovative design, and practical functionality. It's an excellent choice for those who need a versatile and reliable knife for everyday tasks or more challenging cutting requirements.