Ampro Tools T11390 1/2-Inch Drive Lighted Extension 1/2-Inch (F) by 3/8-Inch lighted extension with 3/8-Inch (F) by 1/2-Inch (M) adapter 3 LR44 button cell batteries included Chrome vanadium steel Light shines through sockets for working in low light areas Perfect for the home and professional mechanic