Premium HSS Spiral Step Drill Bit Set (Black Finish, Tri-Flat Shank) for Metal fabrication

Name: Premium HSS Spiral Step Drill Bit Set (Black Finish, Tri-Flat Shank) for Metal fabrication
Brand: Xiaoman Tools
SKU: step-4

High-Efficiency Hole Expansion Engineered for Industrial Demands

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Specifications

Product Name	Industrial HSS Spiral Step Drill Bit Set (Black Finish)
Drill Type	Step Drill Bit
Material	High-Speed Steel (HSS)
Surface Finish	Black Oxide (Rust & Wear Resistant)
Flute Type	Twin Spiral Flute
Sizes	4-12mm, 4-20mm, 4-32mm (Fully Customizable to Client Specs)
Working Length	Customizable based on OEM requirements
Shank Type	Tri-Flat Shank (Anti-Slip)
Process	Fully Ground CNC
Application	Sheet Metal, Aluminum, PVC, Wood
Customized Support	Full OEM/ODM (Sizes, Shanks, Logos, Packaging)
MOQ	Negotiable based on packaging

Optimized Twin Spiral Flute: The deep spiral groove geometry ensures a smoother cutting experience. It drastically reduces operational noise, requires far less downward force than straight flutes, and ejects chips rapidly.
Anti-Slip Tri-Flat Shank: Milled with three flat sides, the shank locks securely into standard drill chucks, completely eliminating bit spin-out during high-torque applications.
135° Split Point Tip: Increases cutting speed through aggressive self-centering. The drill bites instantly into the material without "walking" or running off-center.
Durable Black Oxide Finish: The specialized black finish enhances corrosion resistance and retains cutting edge sharpness, providing longer life in demanding environments.
Limitless Customization: While our standard sets cover popular ranges (4-12mm, 4-20mm, 4-32mm), our factory supports 100% custom dimensions, overall lengths, and specialized step increments tailored to your market. (Note: Designed for rotary use only).