ISO9000 HSS Drill Bit 1/8 - 1 3/8 Tin Coated Drill Bits Hex Shank
XRTOOLS TiN Coated Spiral Step Drill Bit – 1/8" to 1-3/8" Inch Sizes for Stainless Steel, Aluminum & Plastic
Inch Size Spiral Step Drill Bit – TiN Coated HSS, 3-Flat Shank, for Stainless Steel and Plastic
The XRTOOLS Spiral Step Drill Bit with Titanium Nitride (TiN) coating is a premium tool designed for precision drilling across multiple hole sizes in metal, stainless steel, aluminum, plastic, and more. With inch-based sizing (imperial system) and an advanced spiral flute design, this step bit is ideal for professional users in the U.S. and Russian markets seeking durability, clean hole finishes, and multi-diameter performance without changing tools.
Engineered for Performance
Manufactured from high-speed steel with enhanced hardness and wear resistance, the XRTOOLS spiral step drill bit features:
TiN Coating: Improves heat resistance, reduces friction, and extends tool life
Spiral Flute Geometry: Offers smoother drilling, faster chip removal, and reduced vibration compared to traditional straight flute designs
Self-Centering Split Point (118°): Eliminates the need for pilot holes
Laser-Etched Inch Markings: Long-lasting, easy-to-read sizing on every step
Universal Fit: 3-flat or hex shank options compatible with American and Russian hand drills (10mm, 13mm, or 3/8", 1/2" chucks)
Product Specifications
| Feature | Specification |
|---|---|
| Material | HSS with 5% cobalt content (optional) |
| Coating | TiN (Titanium Nitride, gold finish) |
| Flute Type | Spiral / Helical |
| Tip Angle | 118° split-point |
| Step Sizes (inch) | 1/8", 3/16", 1/4", 5/16", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8" |
| Number of Steps | 5 / 9 / 13 (varies by model) |
| Shank Type | 3-flat or 1/4" hex shank |
| Application Materials | Stainless steel, mild steel, aluminum, plastic, PVC |
Metric range versions (4–32mm) available for custom or dual-market orders.
Typical Applications
Electricians: Drilling panel knockouts or conduit holes
HVAC Installers: Ductwork hole expansion or mounting points
Automotive Technicians: Creating or enlarging chassis holes
Metal Fabrication: Punching clean holes in stainless steel sheets
DIY / Workshop Use: Wood, plastic, and laminate drilling tasks
Packaging Details
XRTOOLS offers flexible packaging options to suit different sales channels and customer needs:
Retail Packaging
Single drill bit in clear plastic tube or hanging blister card
Branded color label with barcode (UPC/EAN)
English or bilingual (EN/RU) packaging available
Combo Kits
3pcs kit (e.g. 1/8–1/2", 3/16–3/4", 1/4–1-3/8")
Includes foam insert or molded case
Great for tool stores, e-commerce, and multi-use buyers
Bulk / OEM Packaging
10 / 25 pcs per industrial box (without branding)
Custom logo engraving on shank available
Private label support with MOQ from 500 units
Shipping-ready barcodes and technical spec sheets included
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.