4 – 12MM Spiral Flute Step Drill Bit Cobalt M35 Steel For Stainless Steel And Aluminum
XRTOOLS M35 Spiral Flute Step Drill Bit – Cobalt Steel for Stainless Steel, Metal, Aluminum
The XRTOOLS M35 Spiral Step Drill Bit is a premium, high-speed steel tool engineered for multi-diameter hole drilling across a wide range of materials. Crafted from 5% cobalt alloyed HSS (M35) and featuring a precision spiral flute design, this bit offers smoother chip evacuation, less vibration, and longer tool life.
Whether you're drilling stainless steel (304/316), sheet metal, plastic panels, or aluminum plates, this step bit ensures clean, concentric holes with minimal burr. It eliminates the need to switch between multiple drill sizes.
Use Cases (Applications)
Metal fabrication shops: Punch holes in stainless steel panels, enclosures
HVAC installers: Drill into ducts, galvanized sheet, control boxes
Electricians: Enlarge knockout holes for conduit fittings
Auto mechanics: Drill chassis holes for sensors or mounts
DIY & workshop: Plastic drilling for models, shelves, electrical work
Technical Specifications
| Feature | Specification |
|---|---|
| Material | M35 High-Speed Steel (5% cobalt) |
| Flute Design | Spiral / Helical |
| Step Configuration | Multi-step, laser-etched sizes |
| Coating | Optional TiAlN / Black Oxide / Uncoated |
| Step Range | 4–12 mm / 4–20 mm / 4–32 mm (or Imperial) |
| Shank Type | 3-Flat / Hex / Round |
| Tip Geometry | 118° Split Point |
| Compatibility | Hand drills, presses, cordless tools |
Key Advantages (Why Choose XRTOOLS)
1. Spiral Flute → Faster chip removal, quieter operation
2. Cobalt M35 Core → Handles high heat & hard metals
3.No Bit Change Needed → Multiple diameters in one tool
4.Clean Entry → Reduces material deformation or burr
5.Durable Coating → TiAlN for extended service life
Available Packaging
Single drill bit in retail blister card or clear tube
3-piece combo kits (4–12 / 4–20 / 4–32 mm)
OEM bulk packaging for distributors (10/25 pcs per box)
Custom logo & barcode options for private label brands
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.