Can be adjusted forward and reverse, mini size and portable. A must have tool in your tools bag.Features:Use: Wood DrillingProduct size: 5 6 7 8 9 10 11 12 13mm/0.19 0.23 0.27 0.31 0.35 0.39 0.43 0.47 0.51 inchShank diameter: across flats 6.35mm/0.25inch hex shankshank size :1/4inchInner Hex:5mm-13mmMaterial: SteelSize:3Pcs(5/6/7mm) 6Pcs(8/9/10/11/12/13mm)9Pcs(5/6/7/8/9/10/11/12/13mm)14Pcs(3/16,1/4,9/32,5/16,11/32,3/8,7/16,5mm,5.5 mm,6mm,7mm,8mm,10mm,12mm)Usage: Screwdrivers nut driver socket bitsNote:Please allow 1-3cm differs due to manual measurement.Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.Package Included:3/6/9/14pcs Magnetic Nut Driver Set Socket Adapter