Faithfull FAISOC388 Hexagon Socket 3/8in Drive 8mm These Faithfull Hexagon Sockets are professional high-quality 3/8in drive metric sockets forged from chrome vanadium steel which is hardened tempered and satin chrome plated for corrosion protection. Faithfull sockets have a hexagon design that gives an accurate fit on both nuts and bolts and the chamfered end allows easy nut location and entry. Size 8mm