General description These premium quality taper drill bits are made of high-quality alloy steel, providing superior cutting power. They feature high hardness and wear resistance, making them convenient for fast drilling. The set includes five different sizes, making it versatile for various applications. Technical specifications Material: High-quality alloy steel Sizes included: 2.8x8mm, 3.0x8mm, 3.2x8mm, 3.5x8mm, 4x8mm Usage Suitable for drilling wood, plastic, soft metal, fiberboard, and aluminum alloy Ideal for creating holes and countersinking screws Other information Function: Faster cutting and chip removal without needing to replace the drill bit for smooth countersinking