Back under the Boker Plus banner, the legal-to own Boker-Matic is now available with a handy pocket clip. The handle is made of gray fiberglass reinforced nylon, and the 4416 stainless steel blade can be retracted into the cavity with one hand via the auto-retract mechanism. To open the knife: Slide scale sideways and push button up. To release auto-retract blade, slide scale and blade automatically retracts into handle. This is a very unique knife mechanism and sure to please!