TAC Force TF-669 Series Assisted Opening Tactical Double-Blade Folding Knife, 5-1/4-Inch Closed Spring assist folding knife offers rapid one-handed deployment, locks securely into place with liner lock Dual stainless steel blades; designed to have one or both blades open at a time Blades tuck away securely into the aluminum handle Comes complete with a pocket clip for easy and safe carry 5-1/4-inch closed length, 2-1/2-inch blade length with 3mm thickness