Specifications:This set of 13 pcs titanium coated drill bits are durable and useful.Titanium coating facilitates faster penetration with less effort.The 1/4" hex shank is specially designed for cordless screwdrivers, enabling you to quickly change drill bits.Titanium coated HSS drill set with standard 1/4" hex shank that will fit cordless screwdrivers, drills etc or use in standard drill chuck.Suitable for using with steel, wood, plastic, aluminum, iron drilling, etc.Type: Drill Bit SetQuantity: 13 PcsMain Color: GoldenMaterial: HSSSurface Treatment: Titanium CoatedFeatures: Quick Change, Twist, Useful ToolsShank Size: 1/4" Hex ShanksSize(Dia): 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 4.8mm, 5.0mm, 5.5mm, 6.0mm, 6.5mmNotes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes: 1 x Drill Bit Set(Total 13 Pcs)