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Massad Ayoob is an established authority and writer on firearms and knives. For more than four decades he has taught defensive knife and firearm programs and appears frequently as an expert witness in trials involving edged weapons. Along the way he developed an all-purpose tactical folder suited to his preferences that is the Spyderco C60 Massad Ayoob CLIPIT®. 

Most unusual about his folder is its radical angle of the handle to the blade. Ayoob explains: "With a typical knife, thrusting lifts the blade's point above the line of the forearm, like a boat prow going through water. The faster, harder or more resistance encountered, the higher the prow rises deviating the blade off course from its original target which can mitigate the depth of the cut and can cause the blade to literally 'skid' when a resistant surface is hit." 

The C60's radical angle brings the blade into line with the long bones of the forearm, channeling the body's force directly behind the line of the cut resulting in minimized blade deviation and maximized accuracy. Because of the blade to handle angle, the Ayoob has a short opening arc, translating into fast opening.

The Spyderco Massad Ayoob features also include a PlainEdge VG-10 stainless steel blade with a deep belly for maximized slicing potential. It has a notably strong lock-back with a David Boye style release lever that helps ensure safe lock-up. The black G-10 handle has an ergonomic thumb rest at the rear of the blade and a steel pocket clip for right/left hand tip-down carry

The Spyderco Ayoob is a limited number Sprint Run.