Hex driver sizes include: 1/4-Inch, 5/16-Inch, 3/8-Inch, 7/16-Inch, 1/2-Inch, and 9/16-Inch, Handle not includedImpact-rated sockets for the toughest driving applicationsFlip sockets enable quick access and convenience to common sizesColor coded hex sizes for easy identificationStore sockets in any order and orientation on the shaftBit holding design allows the 1/4-Inch socket size to drive hex fasteners and hold screwdriver bitsFlip socket set can quickly attach to an impact driver or our 1/4-Inch quick-connect driver handles for any situation