Irwin: T394100 PoweGip Set T394100 Reverse spiral flutes for maximum gripping power. Universal shape fits metric and fractional sizes. 1/4 hexagon shank suitable for use with power drills and nut drivers. Durable high carbon steel for longer life. Overall length: 27mm. 7 Piece Contents: 1/2, 7/16, 9/16, 3/8, 5/16, 1/4, 3/16. Supplied in carrying case. MPN: 394100 EAN: 0024721037633 T394100 PoweGip Set Attributes: Drive Size: 1/4in Drive Type: Hex Includes: 7/16 in Bit 3/16 in Bit 10 mm Bit 1/4 in Bit 5/16 in Bit 1/2 in Bit 3/8 in Bit MFR Part No.: 394100 Material: Carbon Steel Number of Pieces: 7 Overall Length: 27mm Product Range: 3/16 - 1/2in Product Type: Stud Extractor Set Socket Size: 3/8in 11mm (7/16in) 10mm 3/16in 1/4in 8mm (5/16in) 1/2in Weight Each: 50g