Description This set includes 15 high-speed steel twist drill bits coated with titanium nitride, designed for increased durability and longer life. The bits are suitable for drilling into various materials such as metal, wood, and plastic. Specifications Number of pieces: 15 drill bits Material: High-speed steel with titanium nitride coating Bit sizes: 1.5mm (x2), 2.0mm (x2), 2.5mm (x2), 3.0mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 6.0mm, 8.0mm, 10mm Warranty: 1 year Compatibility and Accessories Compatible with standard drill chucks Includes a soft grip plastic case for storage and organization Installation Insert the desired drill bit into the drill chuck and tighten securely before use Usage Use appropriate drill speeds for different materials Apply steady pressure during drilling for best results