DIN 7422, short version, chrome vanadium, chrome-plated, burnished tips, for hexagon head screws.
6-ktmm:. 4.0 * Length: 38.0mm Diameter: 22.0mm.
* Out of DIN series PROFILE: ALLEN SIZE / SIZE: 4 MM DRIVE: 1/2 INCH LENGTH: 38.0MM FOR IMPACT GUNS: NO MAGNETIC: YES PIN TO RELEASE: NO INSULATED VDE: NO