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Overview & Details
Crafted from M35 cobalt steel with TiAlN coating for drilling hardened metals stainless steel and alloys. Features 4-spiral flutes for efficient chip removal and 3/8" hex shank for drill compatibility. Includes 19 sizes (1/8" to 1-3/8") for versatile applications - from electronics to piping. Industrial durability with .
Key Advantages
- Complete Industrial Sizing System：Comprehensive set includes 13-step (1/8"-1/2") great for electronics enclosures, 12-step（3/16" to 7/8"）suitable for combination of range and density, 9-step (1/4"-3/4") for machinery assembly and oversize 4-step (up to 1-3/8") for industrial equipment.
- Industrial-Grade Durability：Engineered with premium M35 high-speed steel, our unibit step drill bits withstand rigorous factory production line use. Proven to maintain peak performance through 8+ hours of continuous drilling on hardened steel, stainless steel, and industrial metal sheets - reducing downtime for tool .
- 89HRC3 Coating for Heavy-Duty Protection：The industrial aluminum nitride coating (89HRC3 hardness) delivers superior heat resistance for extended drilling sessions. Ideal for high-volume stainless steel part manufacturing, maintaining sharpness through 500+ holes to minimize consumable costs.
- Precision Engineering for Mass Production：118° split-point design with self-centering action enables rapid hole positioning - perfect for automotive components and machinery parts manufacturing. Hex shank compatibility with all industrial power tools increases production output to 300+ precision holes per shift.
- Multi-Process Manufacturing Solution：Four-flute spiral design efficiently clears metal chips during continuous operation. Works seamlessly with HVAC systems, electrical panels, and plumbing installations. Includes magnetic step drill bits for improved metalworking efficiency.
Shipping & Delivery
We deliver exclusively to the address on file with your eBay account. Double-check your details to avoid any delays.
Shipments typically leave our facility within 1-2 business days, with most orders arriving in 3-7 business days depending on your location.
Shipping is restricted to the contiguous US—no service to Alaska, Hawaii, Puerto Rico, or PO Boxes.
Hassle-Free Returns
Should you wish to return your purchase, please initiate a request via eBay within 30 days of receipt. Items must remain in their original condition and packaging.
If an item arrives damaged or significantly different from its listing, contact us through eBay’s messaging system. We’ll work quickly to make it right.
Payment Methods
We accept PayPal and major credit cards through eBay’s secure payment process. Ensure your billing information is up to date for a smooth transaction.
Need Help?
If you have any questions or require assistance, please send us a message via eBay. Our team strives to respond within 24-48 hours.