This Klutch 3/4in.-drive 12-pt. chrome vanadium socket is fully chamfered on both ends to accept drive tools and fasteners easily. Surface Drive Technology applies force to the walls of fasteners instead of the points, reducing stripping or rounding of fasteners. Backed by a lifetime guarantee. SAE Socket Size in. 2 1/2, Drive in. 3/4, Point 12, Material Type Chrome vanadium. 3/4in.-drive 12-pt. socket Fully chamfered on both ends to accept drive tools and fasteners Chrome vanadium steel construction Cold formed for consistent dimensions and greater strength Nickel-chrome finish for corrosion resistance Surface Drive Technology applies force to the walls of fasteners instead of the points, resulting in longer fastener life Meets or exceeds ANSI and DIN specifications