Silverline Magnetic Nut Driver Set 9Pce 5 - 12Mm Tools Set 855189 Chrome vanadium steel nut driver set for use with power drills. 1/4 Inch hex drive. Includes sizes 1/4 Inch, 9/32 Inch, 5/16 Inch, 11/32 Inch, 3/8 Inch, 13/32 Inch, 7/16 Inch, 15/32 Inch and 1/2 Inch. Compatible with all 6.35mm chucks. Features: Chrome vanadium steel For use with power drills 1/4 Inch hex drive Includes sizes 5, 5.5, 6, 7, 8, 9, 10, 11 & 12mm Compatible with all 6.35mm chucks Specifications: Dimensions: H:15.8 x W:2.2 x D:11.3 cm Colour: Blue Material: Chrome Vanadium Steel Model Number: R200137