TEKTON 1366 3/8-Inch Drive Hex Bit Socket Set, Metric, 3 mm - 10 mm, 9-Sockets Hardened carbon steel sockets with corrosion-resistant chrome plated finish High-strength chrome vanadium steel bits Precisely-machined ends for exact fit in fastener head Notched drive end locks onto drive tang to prevent sticking in fastener or being dropped Use with any 3/8 in. drive ratchet or extension