1/4" Dr. Extensions, 1/4 in (female square); 1/4 in (male square) drive, 10 in

Designed for superior performance in a variety of lengths for hard-to-reach applications. Forged and machined for best fit and unyielding strength. Precision Heat-Treated and tempered for optimal hardness, ductility and durability. Meets and exceeds ASME B107 hand tool standards.