PUMA is pleased to introduce SGB German Blade Pounce Spring-Assisted opening knives. The Pounce knife opens with a small amount of pressure on the blade power tab to start opening the knife. The spring will then take over and the blade will "pounce" open and lock into place. These knives are easy to open with one hand. Each PUMA SGB knife is made with 440A German steel for extended blade life and each blade is individually tested to ensure hardness between 55 and 57 and bears the dot of a Rockwell proof mark.