The two safeties are responsible for covering their respective halves of the field from 20 yards out and more. The safeties in the system are expected to be above-average cover men with the ability to break up passes, but each safety also is expected to have additional specific skills. The strong safeties, while not expected to be great tacklers, are expected to be hard hitters. The hard hitting strong safety protects the middle of the field from being exploited by small, fast receivers, and running backs on wheel route. The free safety will be called upon to do one of two things in certain situations: either blitz the quarterback, requiring him to have the skills necessary to beat a blocking halfback or fullback, or to assume the coverage zone left by a blitzing cornerback.