Metal Drill Bits for Hard Steel,Cobalt Drill Bits,20PCS Gold Hss Drill Bits Set, 3mm,4mm,5mm Twist Drill Bit for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum, Wood, Professional Accessory

Product description

• High-quality materials metal drill bits for hard steel, suitable for hard steel, fast drilling speed, low contact force, no pre-punching or pre-drilling required. Suitable for daily DIY jobs, can quickly and accurately drill holes in soft metals such as aluminum, wood, gypsum and plastic.
• Packing list 10 3mm drill bits + 5 4mm drill bits + 5 5mm drill bits. Twist cobalt drill bits are made of cobalt-containing high-speed steel, which is quenched at high temperature, wear-resistant and tough.
• Professional drill bits 135 self-centering hss drill bits, no pre-drilling or center punching required, quickly penetrate metal plates with less pressure, prevent walking, and remove chips and particles faster.
• Easy to use These metal drill bits can be used for column drills, handheld electric drills, battery-powered drills, etc., and can also be used in CNC machines. When using, the drill bit should be perpendicular to the metal plate and kept cool.
• Widely used When using drill bits for metal, the drill bit should be perpendicular to the metal plate and kept cool. Pay attention to controlling the temperature and speed when drilling. Very suitable for professionals, home improvement enthusiasts and DIY enthusiasts.