DIN 3124, chrome-vanadium, chrome-plated, polished. With traction profile.
12kt.-mm: 12.0 Length: 38.0mm Bore: 17.5mm Depth: 11.0mm PROFILE: BI-HEXAGONAL SIZE / SIZE: 12 MM DRIVE: 1/2 INCH LENGTH: 38.0MM FOR IMPACT GUNS: NO MAGNETIC: YES PIN TO RELEASE: NO INSULATED VDE: NO