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. Titanium coated drill bits. 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(13 Pcs)