Why a suregrip?

Having had several sure grips over the years, it acts as a peg leg under normal driving, then when ya gas on it pretty good the clutches grip or lock in under hard type accelerations and cause both wheels take hold or grip, giving better hole shots one could say, but (don't try it in turning corners), also if you hear a click or slight popping from one, there is a rear end additive for sure grip and limited slip rear ends that helps, it worked for mine...