Cobratec Out The Front Knives CTK-1 Large OTF knife is a Double Edge Part Serrated silver black 2 Tone 3.9" 440C stainless blade with a Black Handle made of zinc-aluminum alloy covered in a slip resistant grip. It includes a pocket clip, glass breaker and a nylon sheath. It is dual action meaning a simple push of the button opens and closes the blade! It's a fully automatic knife. A GREAT out-the-front pocket knife for every day carry!