3-Piece Hex Shank Step Drill Bit Set: 3-12mm, 4-12mm, 4-20mm Bearing Steel Cone Hole Opener

This versatile drill bit set features three pieces, each with a hex shank design for enhanced grip and stability during use. The set includes step drill bits that allow seamless drilling in sizes ranging from 3-12mm, 4-12mm, and 4-20mm. Made from durable bearing steel, these bits offer precision and longevity, making them ideal for creating smooth, clean holes in various materials. Designed for both professional and DIY projects, this set is perfect for expanding your toolkit and achieving accurate results with ease. Material: Bearing steel Total length: 65mm, 74mm, 77mm Blade diameter: 3-12mm, 4-12mm, 4-20mm Shank diameter: 6.3mm Manufacture country: China Instructions included: No