U.S. Marines by MTech USA M-A1020 Series Spring Assist Folding Knife, Half-Serrated Blade, 5-Inch Closed Spring assist folding knife offers rapid one-handed deployment, locks securely into place with liner lock 3.5-inch, 4mm thick half-serrated stainless steel blade Black rubber-coated nylon fiber handle Pocket clip for easy and safe carry Measures 5 inches closed