This Kershaw Emerson knife now comes with D2 blade steel. D2, a high-carbon, highchromium tool steel, is a knifemaker favorite and offers good edge retention and hardness. For a secure grip, the knife has a G10 front scale and steel back. A sturdy frame lock secures the blade open during use. And, of course, the knife also features the patented Emerson Wave Shaped Feature for fast and easy opening. This Kershaw?Emerson now comes with D2 blade steel. D2, a high-carbon, high-chromium tool steel, is a knifemaker favorite and offers good edge retention and hardness, as well as being more corrosion resistant that other high-carbon steels. The Kershaw Emerson CQC-6K D2 is a manual opener using either the thumb disk or the patented Emerson Wave Shaped Feature. This opening feature enables the knife to be opened as it is removed from the pocket. By the time the knife has been fully withdrawn from the pocket, the blade is deployed and ready for use. A small wave-shaped tab on the top of the blade is built to catch on the pocket seam, opening the knife as it comes out of the pocket. This instant-open feature is a favorite among military, rescue, and law enforcement knife users. Designed by Emerson, built by Kershaw Manual opening Thumb disk; Emerson Wave Shaped Feature(R) Frame lock Reversible pocketclip (left/right, tip-up) Lanyard hole Steel: D2, stonewashed & satin finish Handle: G10 front; 410 stainless steel back, bead-blasted finish Blade Length: 3.25 in. (8.3 cm) Closed Length: 4.5 in. (11.4 cm) Overall Length: 7.75 in. (19.7 cm) Weight: 5.1 oz. (144.6 g)