Ingco AKD1251 25-Piece HSS Drill Bits Set. Crafted from premium M2 high-speed steel, these fully ground drill bits offer exceptional durability and performance across various materials. The set includes 25 drill bits with sizes ranging from 1.0mm to 13.0mm, covering a broad spectrum of drilling applications. The fully ground flute design ensures precise and efficient drilling, making these bits suitable for professional and DIY projects. Featuring a 135° point angle, these drill bits are optimized for fast and accurate penetration, delivering clean and precise holes. The drill bit sizes range from 1mm to 13mm in 0.5mm increments, providing versatility for various projects.