High Hardness Groove Step Drill Bit 4-32mm Titanium Coated HSS Step Drill Bits for Precise Drilling

Multi-Diameter Step Design
HSS spiral-flute step bits cover 4–32mm in one tool, allowing drilling, enlarging, and deburring without changing bits.
Titanium Coated for Durability
Titanium coating increases surface hardness and heat resistance for longer bit life. Spiral flutes ensure smooth chip removal and cleaner holes.
Hex Shank for Secure Grip
Standard hex shank fits tightly into drill chucks to prevent slipping, providing stable and precise drilling control.
Versatile Material Compatibility
Ideal for thin metal, aluminum, plastic, wood, and more—suitable for repair, installation, DIY projects, and professional fabrication.