xiluuyou 3PCS HSS Step Bits, Spiral Drill Bit Sets, 4-12/4-20/4-32mm, Hole Cutter for Sheet Metal, Plastic, Steel Plate

【3-Piece Step Drill Bit Set】 - High-Speed Steel for Precision DrillingThis premium step drill set includes three essential sizes: 4-12mm, 4-20mm, and 4-32mm, covering all your precise drilling needs for home DIY, workshop projects, or professional use. Crafted from high-speed steel (HSS) with a titanium coating, the bits reduce friction, lower operating temperatures, and deliver exceptional durability—ensuring long-lasting sharpness and consistent accuracy. 【Versatile for Multiple Materials】 - Ideal for drilling through metal, wood, plastic, and more. The multi-step design allows you to create multiple hole sizes or stepped holes without frequent bit changes, saving time and effort. 【Spiral Flute Design】 - Special spiral chip evacuation grooves clear debris efficiently, resulting in clean, smooth holes. Dual-spiral cutting edges enhance drilling speed and stability, even in tough materials. 【Durable storage bag】 - Comes with a sturdy blue bag for safe transportation, organized storage, and easy access—keeping your drill bits protected and clutter-free. 【Laser-Engraved Sizes】 - Permanent laser-marked measurements won’t wear off or fade, ensuring precise size selection every time, even after prolonged use.