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 Set Quantity: 13 Pcs Main Color: Golden Material: HSS Surface Treatment: Titanium Coated Features: Quick Change, Twist, Useful Tools Shank Size: 1/4" Hex Shanks Size(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, 6.5mm Notes: Due to the light and screen setting difference, the items 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)