GearWrench 9702 13 Piece Flex-Head Combination Ratcheting Wrench Set SAE 13 pc. SAE set includes - 5/16-Inch, 11/32-Inch, 3/8-Inch, 7/16-Inch, 1/2-Inch, 9/16-Inch, 5/8-Inch, 11/16-Inch, 3/4-Inch, 13/16-Inch, 7/8-Inch, 15/16-Inch and 1-Inch Flex head combination ratcheting wrenches Flex Head tilts up to 180-Degree at any interval with Surface Drive design nearly eliminating fastener rounding Adjustable Set Screw allows you to set desired head tension with Spring Washer Design providing continuous head tension Ratcheting box-end needs as little as 5-Degree to move fastener VS. 30-Degree for standard box end wrenches Serrated wrench beam allows you to feel which way to pull