3/8" Dr. Extensions, 3/8 in (female square); 3/8 in (male square) drive, 3 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
- Easy to read stamp pattern in order to quickly determine opening size
- Meets and exceeds ASME B107 hand tool standards