KD Tools 21mm Flex Combination Ratcheting GearWrench 9921

21mm Flex Combination Ratcheting GearWrench DESCRIPTION: • 21MM Flex Combination Wrench Ratcheting box end needs as little as 5 degrees to move fastener vs. 30 degrees for standard box end wrenches • Surface Drive® design nearly eliminates fastener rounding • Flex head tilts up to 180 degrees at any interval • Adjustable set screw allows you to set desired head tension • Serrated beam allows you to feel which way to pull