Vigor V2079 Hexagon Socket Screwdriver Bit, 13 mm, L 100 1/2"

Hexagon Socket Screwdriver Bit With Drive: Square 12.5 mm (1/2 Inch) And Spanner Size S1Xs2: 13 mm Designed And Tested To Reach Studs In Difficult Work Areas Heat Treated For The Correct Balance Of Strength And Hardness