TEKTON SID91107 3/8 in. Drive Deep 6-Point Impact Socket Set, 19-Piece (6 mm 24 mm)TEKTON impact sockets have both a high-visibility laser marking and a permanent stamped marking that wont wear off. Theyre designed for use with both friction ring anvils and detent pin anvils. Precise 6-point openings provide an exact fit for hex fasteners. Each socket size meets a minimum of 1.3 times the ANSI/ASME standard for proof torque.Sizes are marked both with a high-visibility laser marking and a permanent stamped marking that wont wear off6-point socket openings provide an exact fit for hex fastenersRadiused corners prevent fastener round-off by applying force to a fasteners flat sides, rather than its cornersMeets a minimum of 1.3 times the ANSI/ASME standard for proof torqueTwist-to-lock socket rail organizes and securely holds sockets in place, both for in your toolbox and on the go19-pieces, 3/8 in. drive deep 6-point impact sockets: 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mmSocket railDimensionsDrive Size3/8 in