Pass-throughs are guaranteed with the EZ-Flex Blade™ design. This design-feature will revolutionize the way archers view penetration. The all-new blades actually have the ability to flex as they pass through an animal. Now, if a bone is struck, the blade is able to flex and deflect, allowing it to by-pass bone (unless the bone is struck head-on of course). This EZ-Flex Blade™ feature results in massive hemorrhaging and unmistakable blood trails.