The Vapor Series offers a unique "drilled" industrial design combined with the butter smooth, one-handed, manual opening. The open handle is built of heat-treated, high strength 410 steel while the drilled design enhances the knife's airy look and feel. The blade is made of premium AUS 6A stainless-steel. For extra strength, the blade is flat ground to Kershaw's famous, "shaving sharp" edge. The blade opens manually as the user pushes on the thumb-stud and rotates the blade into position. A frame lock holds it securely in position.