Based on the world-renowned knife design of Mikkel Willumsen, the Lansky Responder X9 is an aggressive, manually-operated folding knife that doesn't use a spring-loaded or assisted opening action. The 4-inch blade is made from Sandvik 12C27 steel that keeps its edge and resists corrosion, ensuring that you always have an ultra-sharp knife at your disposal. The G10 handle delivers improved grip, while the extended thumb hole allows for easy and safe one-handed opening. A strong stainless steel liner lock holds the knife in place when cutting. When the knife isn't being used, the deep 2 position pocket clip keeps your knife out of sight and allows for both tip up and tip down carrying.