GearWrench 85798 8 Piece XL Locking Flex-Head Ratcheting Combination Wrench Set SAE 8 pc. SAE XL Locking Flex set includes - 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16" & 3/4" 13 locking positions with flex head and 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 15% longer than current Flex Head ratcheting wrench to increase length to access those hard to reach fasteners Surface Drive Plus provides stronger grip on fasteners, nearly eliminating fastener rounding