Professional spline bit for commercial or occasional use M10 spline bit Spline bit socket Male spline socket Impacted spline bit for added strength and durability Manufactured from chrome vanadium steel for strength and durability Extra long for access into restricted hard to reach areas Total length of the spline bit 78mm 1/2" Drive so suitable for use with any 1/2" Drive Ratchet / Extension / Power bar etc... M10 impacted spline bit