Upon contact with the target the tip is pushed in deploying and locking the blades into place before the broadhead penetrates the target. Giving you maximum cutting diameter on the entry hole as well as the exit hole. The SwitchBlade's rear deploying blades won't deflect angled shots. To re-set the SwitchBlade to the closed position simply pull the tip back out. Over 1 3/8" cutting diameter! 3-blade. (no O-rings or rubber bands)