Vigor V2100 Driver, Internal Serration M16 mm, L 55, 1/2"

Screwdriver Socket For Screws With Internal Serration (Xzn) With Drive: Square 12.5 mm (1/2 Inch) And Spanner Size S1Xs2: M16 mm Designed And Tested To Reach Studs In Difficult Work Areas Heat Treated For The Correct Balance Of Strength And Hardness