|These knives are ready to rip and run ragged. Combat and survival: all in one knife. The newest additions to the Z-Slayer family are none other than these 13 inch beauts. They come equipped with any extra add-ons one may need in the wild or in the battlefield. Can you say stainless steel? That just describes the material for the window breaker (or if you like- skull crusher). There is an awesome pattern of deadly skulls that covers the entire knife only to scare the baddest undead. There is an easy to grip and textured handle complete with grooves for almost any sized hand. The blades are razor sharp and made to cut walking undead flesh.