This is the Integy Team Standard Hex Socket Set. This set of three nut drivers includes a 3/16", a 1/4", and one 11/32" driver.
Features:
Includes:One 3/16" hex socket (nut driver)One 1/4" hex socket (nut driver)One 11/32" hex socket (nut driver)
Specifications:Length: 5.85" (149mm)Diameter: .70" (18mm) handle