Protech Harkins ATAC Double Action Automatic Knife Carbon Fiber Two Tone Blade.  The Protech Harkins ATAC Double Action Automatic Knife Carbon Fiber Two Tone Blade is 3.35" long with a closed length of 4.5" and an Open Overall Lenght of 7.85".  It weighs 3.7 ounces.  Incredible new double action folder!  Hidden within the sleek design of this liner lock is a super fast leaf spring auto opener.  This new double action ATAC has exactly the sam dimensions and looks as the manual version.  To activate the auto feature, simply press on the bottom corner of the first carbon fiber inlay.  We are proud to offer the most lightweight, sleek, and high quality double action folder on the market.  The new ATAC features all T6 6061 aluminum frame with carbon fiber inlays.  The 3.5" blade is 154-CM.  Due to high demand for this knife and the slow production process we expect that the ATAC double actions will be very hard to come by.