Originally designed to comply with restrictive British knife laws, the UK Penknife™ has developed a cult following among pocketknife enthusiasts worldwide. The original SLIPIT™ model, it combines one-hand opening via our Trademark Round Hole with the convenience and accessibility of clip carry. This unique expression of it showcases a full-flat-ground blade crafted from CPM® SPY27®, a cobalt-enriched particle metallurgy stainless steel developed specifically for Spyderco. The blade is complemented by fiberglass-reinforced-nylon (FRN) handle scales molded in a distinctive cobalt blue that is one of the signature colors of our family of knives featuring this proprietary steel.

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