Kobalt Standard (SAE) 3/4-in Drive Spline 5/16-in Shallow Socket

This spline socket fits both 5/16-in and 8mm fasteners. Spline sockets work on multiple types of fasteners including SAE, metric, 1-point, 12-point, square, star and most rounded. Constructed from chrome vanadium steel and heat treated for strength and durability. Professional grade, high polish finish. Size callout is hard stamped. Meets or exceeds ASME specifications. Hassle-free lifetime guarantee.