1/2" Dr. Impact Extensions, 1/2" (female square); 1/2" (male square) drive, 5"

Designed for superior performance. Variety of lengths - for hard-to-reach applications. Oiled black oxide finish. 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.