Chrome vanadium, chrome plated, polished. With traction profile.
12k mm: 15.0 length: 60.0mm diameter: 20.8mm depth: 15.0mm PROFILE: BI-HEXAGONAL SIZE / SIZE: 15 MM DRIVE: 3/8 INCH LENGTH: 60.0MM FOR IMPACT GUNS: NO MAGNETIC: YES PIN TO RELEASE: NO INSULATED VDE: NO