Premium Material: The wear-proof cobalt drill bit set is made from M35 high-speed steel with 5% cobalt content for exceptional strength. The clean surface and high grinding precision ensure the bits stay sharp even under tough working conditions Efficient Performance: The 135° quick-cut point ensures automatic centering and reduces drift. With a fully ground design for sharp, durable cutting edges and a twisted structure for chip clearance, the metal drill bit enhances drilling speed 29 Sizes Available: The m35 cobalt drill bit set includes a wide range of sizes to meet various needs, from precision tasks to heavy-duty applications. Ideal for DIY, home renovations, and industrial projects, providing precise and efficient drilling Versatile Material Compatibility: These cobalt drill bits are suitable for a variety of materials, including steel, stainless steel, aluminum, copper, wood, and plastic. Effortlessly handle drilling tasks across different hardness and material types Convenient Storage & Portability: Our drill bit for metal drilling comes with a dedicated storage case to neatly organize and access the various drill sizes. Easy to carry in your toolbag, providing great convenience and flexibility for daily use.