The Boker Plus Double Action knife does have some good features which aren’t obvious on first glance. This knife looks like an ordinary one-handed folder, but the construction quality and the extra slide lock have made the Boker Double Action a popular choice for automatic conversion as well as folding clip carry.
A recessed slide lock holds the blade in closed position for security in the pocket. Unleashed, the original unmodified Boker Plus opens easily with thumb pressure on the stud at the base of the blade. This is where aftermarket modification found the knife useful, tweaking the same basic system for control of automatic blade deployment. Although that’s certainly possible, the usual restrictions do apply. Only active duty military, individuals with specific disabilities, law enforcement personnel, and a few other exceptions may carry automatic-opening knives.
For the rest of us, this is an excellent one-handed-opening pocket knife with a secure frame lock during use and a safety lock for pocket carry. The blade rotates on a sturdy bearing, which will need some cleaning and a little oil now and then, but the structure of the aluminum frame handle — coated with black EDP — keeps most dirt out. A little regular maintenance keeps the knife in proper working order.
The 4.6-ounce Boker Double Action pocket knife holds a 3-1/4-inch-long AUS-8 high carbon stainless steel blade bead-blasted to reduce shine. Although the knife has a plain edge, the blade’s concave section makes emergency cutting of rope, belts, or harness straps competitive with serrated edges and still allows sharpening by the owner. The curve makes whetstone maintenance a little awkward, but a diamond hone should work well.
Boker’s warranty does not cover knives modified from the original pattern.