DIN 7422, chrome vanadium type long sleeves, chrome, sheet tool steel, grey, for hex head screws.
. 6-kt mm: 6.0 Length: 137.0 mm Bore:. 23.0mm PROFILE: ALLEN SIZE / SIZE: 6 MM DRIVE: 1/2 INCH LENGTH: 137.0MM FOR IMPACT GUNS: NO MAGNETIC: YES PIN TO RELEASE: NO INSULATED VDE: NO