SIGMAFORGE knife forged from one piece of steel. FRIODUR ice-hardened blade offers superior resilience. Curved bolster - cut with improved precision safety and comfort. Full edge utility - whole length of the blade can be used. Full tang provides exceptional durability. Sharpened and polished by hand. Blade angle: 15-degrees on each side. Triple riveted ABS resin handle. Dishwasher safe but handwash recommended. Manufacturer lifetime warranty.