The CobraTec Special Edition NAJA-17 OTF Knife is a top button fully automatic double action OTF (out the front) knife that comes standard with a D2 Steel Blade, and a CNC T6061 aircraft aluminum handle. The all CNC construction of the NAJA-17 makes for a precision fit & finish not only on the exterior of the knife but also on the interior operating components as well. T6061 aircraft aluminum is very durable, lightweight and sleek in appearance. All CobraTec Tactical OTF knives are extremely safe to operate and use. CobraTec Tactical OTF knives come with a built-in safety that will not allow the blade to fully deploy if anything is obstructing its path. Once in safety mode the blade will need to be reset by pulling the blade all the way into its locking position making it fully functional again. All CobraTec Knives are backed by a LIFETIME WARRANTY. 3.3 ounces Dual Action OTF 3 Inch D2 Steel Blade 4.25 inch CNC T6061 aircraft aluminum Handle 8 inches in total length with glass breaker