Step Drill Bits
Step drill bits for precision multi-diameter hole cutting in sheet metal, thin plate, and electrical panels. One bit replaces a full set of twist drills. Manufactured in our Hangzhou facility.
Step Drill Bit Selection
Select Step Drill Bits by Sheet Thickness, Step Range and Shank Type
Step drill bits are ideal for thin sheet metal and electrical panels because one tool creates multiple hole sizes. The key is matching step range, coating, shank and material thickness.
| Buyer scenario | Recommended specification | Best-fit use | Quotation focus |
|---|---|---|---|
| Electrical panel holes | HSS step drill, hex shank, TiN optional | Cable glands, conduit entries, control boxes | Clean holes, one bit covers multiple diameters |
| HVAC / sheet metal work | Spiral or straight flute step drill | Thin steel, aluminum sheet, duct work | Less grabbing, smoother cutting, easy resale |
| Retail step drill set | 3-piece or multi-piece set with size markings | Hardware stores, installers, DIY users | Packaging, visible size marking, coating appearance |
What to send before quotation
Send step range, flute type, shank type, coating, sheet thickness and target packaging.
Send Specs to WrynoAbout Step Drill Bits
Wryno Global manufactures step drill bits designed for efficient multi-diameter hole cutting in sheet metal, thin plates, and electrical panels. A single step drill bit can replace an entire set of twist drill bits, drilling progressively larger holes without changing tools — saving time and reducing tool inventory costs.
Our step drill bits are manufactured from high-speed steel with titanium nitride (TiN) or titanium aluminum nitride (TiAlN) coating for enhanced surface hardness and extended tool life. Each step is precisely ground to ensure accurate hole diameters with clean, burr-free edges. The dual-flute design provides smooth chip evacuation and reduces cutting resistance.
As a direct step drill bit manufacturer, we offer both standard and custom step configurations. Whether your customers need step drill bits for HVAC installation, electrical panel fabrication, or automotive sheet metal work, we can produce bits to your exact specifications with competitive factory pricing and reliable delivery schedules.
Applications & Materials
Sheet Metal
Step drill bits are the preferred tool for drilling clean holes in sheet metal. Progressive step design prevents grab and produces burr-free holes.
Electrical Panels
Essential for electrical contractors installing cable glands and conduit entries in steel and aluminum panels. One bit handles multiple hole sizes.
Thin Plate & Tube
Ideal for drilling holes in thin-walled materials where twist drill bits tend to grab or tear. Step design ensures clean, round holes.
Technical Specifications
Our full range includes:
- Step sizes: 2mm increments, custom increments available
- Diameter range: 4mm – 39mm per bit
- Number of steps: 2 to 13 steps
- Material: HSS 6542 / HSS 4341
- Coating: Uncoated, TiN, TiAlN
- Shank: Hex shank, round shank, triple-flute
Contact us for detailed specifications and custom sizes.
Need Custom Step Drill Bits?
Send us your step configuration and diameter requirements. Factory-direct pricing, custom steps, and sample availability.