Features: Engineered with titaniums coated surfaces, these 5PCS twist drills deliver 40% enhanced durability and superior wear resistance, ideal for steel, metal, and aluminum alloy drilling. The precise spirals flute design ensures rapid chip removal and reduced friction, while heat resistant coating minimizes overheating during high speed drilling up to 1200RPM. Perfect for professional metalworkers, automotive technicians, and DIY enthusiasts requiring reliable tools for heavy duty metal fabrication or home improvement projects. Tackle demanding tasks in workshops, construction sites, or garage repairs, effortlessly drilling through thick iron plates, alloy pipes, or stainless steel fixtures with consistent precise. Universal sizing and straight shank compatibility streamlines tool changes across drill presses, hand drills, or machines, ensuring seamless workflow in multimaterial applications. Specifications: Component:Steel Size:Approx.4.3x0.15cm/1.69x0.05inch Option Bit Diameter: Approx.1.5mm,1mm; Applicable scenario: It can also be used for drilling and reaming of wood such as walnuts Package Includes: 1Set/5pcs Twist Drill Bit note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.