3-Piece Hex Shank Straight Flute Step Drill Set: Bearing Steel Conical Drill Hole Opener (Sizes 3-12, 4-12, 4-20).

This versatile step drill set is crafted from durable bearing steel and designed to meet a variety of drilling needs. It includes three pieces, each with a hex shank for a secure grip and compatibility with standard drill chucks. The straight flute design ensures smooth cutting and precise hole enlargement. With sizes ranging from 3-12mm, 4-12mm, and 4-20mm, this set is perfect for creating clean, conical holes in materials such as metal, wood, and plastic. Ideal for both professional and DIY projects, this set enhances efficiency and accuracy in every task. Material: Bearing steel Total length: 65/74/77mm Blade diameter: 3-12/4-12/4-20 Shank diameter: 6.3 Manufacture country: China Instructions included: No