19 Pc Twist Drill Set M35 Heavy Duty Steel Drill Bits Heavy Duty Plastic Box
19-Pc M35 Cobalt Drill Bit Set — Stepped-Point Tips, Jobber Length,metric size
Built for precision starts on tough materials, the XRTOOLS 19-piece M35 cobalt drill bit set features stepped-point tips that bite immediately, resist walking on curved or painted surfaces, and lower thrust at breakthrough. The M35 substrate (~5% cobalt) keeps cutting edges hard at elevated temperatures, while fully-ground twist flutes clear chips fast for cleaner, rounder holes. A heavy-duty metal index case with clear size callouts keeps the entire inch-fractional map organized.
Multi-angle advantages
Instant engagement: Stepped-point geometry pre-centers the bit and acts like a built-in pilot, reducing skidding and burr.
Hot-hard performance: M35 HSS-Co resists softening under heat—ideal for stainless, carbon and alloy steels, and cast iron.
Fewer change-outs: Durable edges + efficient chip evacuation extend life and reduce downtime.
Operator friendly: Lower feed force, smoother entry, and reduced chatter—great on hand drills and drill presses.
Shop-ready kit: Jobber length, round shank fits any 3-jaw chuck; labeled metal case speeds selection and inventory counts.
Typical applications
Stainless (304/316), carbon steel, alloy steel, cast iron, and non-ferrous (brass/bronze/aluminum). Perfect for fabrication & MRO, electrical/HVAC panel work, automotive upfits, fixtures, frames, and general workshop drilling.
Pro tip: On stainless, run lower RPM with cutting oil and peck on deep holes to control heat and chips.
Product Specifications — 19-Pc M35 Stepped-Point Drill Bit Set
| Feature | Details |
|---|---|
| Material | M35 Cobalt HSS (~5% Co), fully ground |
| Tip Geometry | Stepped-point with 135° split—self-centering, low thrust |
| Flutes | Precision-ground twist flutes, polished for chip flow |
| Length Type | Jobber |
| Shank | Round, 3-jaw chuck compatible |
| Finish | Bright ground or Gold |
| Count | 19 pieces |
| Case | Plastic index box, size-stamped wells |
| Resharpenable | Yes—maintain stepped-point/split geometry |
| Recommended Materials | Stainless, carbon & alloy steels, cast iron, non-ferrous metals |
size map (19-pc)
| 1.0 | 1.5 | 2.0 | 2.5 | 3.0 |
|---|---|---|---|---|
| 3.5 | 4.0 | 4.5 | 5.0 | 5.5 |
| 6.0 | 6.5 | 7.0 | 7.5 | 8.0 |
| 8.5 | 9.0 | 9.5 | 10.0 | — |
Usage & care
Steel/stainless: Moderate surface speed, constant feed, cutting oil recommended; peck to manage heat.
Aluminum/brass: Higher speed; light oil improves finish.
Maintenance: Re-grind when lips dull; keep the step and split symmetric for self-centering.
Packaging & OEM (wholesale-ready)
Retail-ready metal index case (sleeved & barcoded); master cartons for distributors.
Private label/OEM: custom assortments (metric/imperial), finish options, laser-etched logo, bilingual EN/RU labels.
FAQ
Q1: How is a stepped-point different from a standard split point?
Stepped-point adds a micro-pilot step ahead of the lips for faster bite and better centering, especially on curved or coated surfaces, while retaining the self-centering benefits of a 135° split.
Q2: Will these drill stainless steel?
Yes—M35 cobalt is designed for stainless. Use lower RPM, cutting oil, and peck cycles.
Q3: Impact-driver compatible?
These are round-shank bits for 3-jaw chucks. Ask about hex-shank cobalt variants for impact tools.
Q4: Metric sizes available?
Yes—19-pc metric or mixed assortments are available on request for OEM orders.
Search-friendly keywords
19 piece cobalt drill bit set, M35 HSS-Co stepped-point drill bits, 135 degree split point metal drill, stainless steel cobalt bits, jobber length round shank, metal index case drill kit
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