Features: Engineered with premium High Speed Steel and double fluted helical design, this 14 piece brad point drill bit set ensures tear less precise drilling in wood, featuring sharpened center tips for accurate positioning and reduced splintering. The twin cutting edges and optimized chip evacuation grooves enhances drilling speed by 30% while minimizing heat buildup, paired with a durability center puncher for effortless hole creation in hardwoods and softwoods. Ideal for carpenters, woodworking professional, and DIYer enthusiasts seeking reliabled performances for intricate furniture assembly, cabinetry projects, or craftwork requiring multi size hole accuracy. Tackle diverse tasks like installing cabinet hinges, assembling shelves, or drilling clean holes in pine, plywood, and composite materials with the included 3-12mm size ranging. Each heat treated drill bit boasts extended life compared to standard carbon steel, while the compact case organizes sizes for quick access – a must have toolkit upgrade for workshop efficiency. Specifications: Component: Alloy Size: 0.3x6cm, 0.4x7.5cm, 0.5x8.5cm, 0.6x9.5cm, 0.7x10cm, 0.8x11cm, 0.9x11.5cm, 1x12cm, 1.2x14cm Applicable scenarios: home punching, factory workshop Package Includes: 14pcs/set Wood Drill Bits note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.