DIN 3124, long form, chrome vanadium, chrome-plated, polished. With traction profile.
12kt mm: 27.0 length: 85.0mm diameter: 36.3mm depth: 27.0mm PROFILE: BI-HEXAGONAL SIZE / SIZE: 27 MM DRIVE: 1/2 INCH LENGTH: 85.0MM FOR IMPACT GUNS: NO MAGNETIC: YES PIN TO RELEASE: NO INSULATED VDE: NO