15% longer than current flex head wrenches, or up to 37% longer than the competition. Increased length to access those hard to reach fasteners. Surface Drive Plus provides stronger grip on fasteners and nearly eliminates fastener rounding. 13 locking positions with flexible head. One finger operated lever with options of "locking" or "not locking" positions Ratcheting box end needs as little as 5 degrees to move fastener vs. 30 degrees for standard box end wrenches.