Chrome vanadium, chrome plated, polished, American dimensions. With traction profile.
12kt mm: 5/8 length: 38.0mm diameter: 22.7mm depth: 12.5mm PROFILE: BI-HEXAGONAL SIZE / SIZE: INCH 5/8 DRIVE: 1/2 INCH LENGTH: 38.0MM FOR IMPACT GUNS: NO MAGNETIC: YES PIN TO RELEASE: NO INSULATED VDE: NO