What materials can this drill bit be used on?

It can drill round holes in stainless steel, mild steel, brass, copper, aluminum, plastic, and wood.

What is the maximum thickness this drill bit can handle?

It can drill holes up to 1/8 inch (3.2mm) thick in most metals.

HSS Cobalt Spiral Flute Step Drill

Name: HSS Cobalt Spiral Flute Step Drill
Brand: Wuxi Eternal Bliss Alloy Casting & Forging Co., Ltd.
SKU: 2126478705

Jiangsu, ChinaWuxi Eternal Bliss Alloy Casting & Forging Co., Ltd.

US$15.00

200-499 pc

US$8.00

500+ pc

Sample price:US$15.00/pc.Request sample

Product profile

Customization

Available

Customized

Standard

AISI

Model NO.

EB1100

Length

Taper-length

Type

Round Shank, 3-Flat Shank, Hex

Material

Cobalt Steel Alloys

Usage

Metal Sheet Drilling Hole

Transport Package

Plywood Case

Specification

Drawing

Trademark

EB casting and forging

Origin

China

Production Capacity

400000000 Piece/Pieces Per Year

Key features

Multi-Material Versatility: Drills true round holes in steel, brass, aluminum, copper, plastic, and wood up to 1/8 inch thick.

Single Bit Efficiency: One step drill bit replaces multiple sizes, drilling various hole diameters without changing tools.

No Pilot Hole Required: Eliminates the need for center punching or pilot hole drilling on most sizes for faster operation.

Permanent Diameter Markings: Hole sizes are clearly identified by laser-etched markings permanently located in the flute areas.

Easy Maintenance: Bits are designed to be easily kept sharp, ensuring long-term usability and performance.

Wide Shank Options: Available in Round Shank, 3-Flat Shank, and Hex types to fit various drill chucks.

OEM and ODM Support: Customization available from both samples and designs with dedicated R&D engineers.

Diverse Applications: Ideal for electrical, automotive, plumbing, sheet metal duct work, and heating & cooling projects.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceExperienced Team

Wuxi Eternal Bliss Alloy Casting & Forging Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs CertifiedExport Year: 10 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤3.40h

AI-Powered supplier vetting

SummaryEB China is an industrial equipment and materials supplier involved in petroleum drilling and production equipment, metallurgical equipment, special steel, non-ferrous alloys, new-material technology, and installation services. Its stated manufacturing scope includes castings, forgings, machinery, and e-bike products, with substantial annual capacity figures. The supplier reports ISO9001, ISO14001, and ISO45001 certifications for its factories. It has documented procedures for corrective and preventive actions, complaint handling, supplier-service assessment, and approved-supplier updates. However, quality traceability, quality-assurance status, and testing-equipment quantity are either unknown or reported as zero. R&D resources are limited to one engineer, with no new products reported in the previous year and no available SDK, although ODM, OEM, sample-based, and design-based customization are offered. Overseas service infrastructure and offline trade-show participation are absent. Customer-facing...

Supplier typeThe supplier operates across industrial equipment, specialized metals, foundry, forging, machinery, and e-bike manufacturing activities. Its stated scope also includes new-material R&D and installation services, indicating a manufacturer and industrial solution provider rather than a purely trading company.

CertificationsThe company states that its e-bike assembly factory, foundry and forging plant, and machinery plant have passed ISO9001, ISO14001, and ISO45001 management-system certification. The slices do not provide certificate numbers, validity dates, or issuing-body details.

After-Sales capabilityThe supplier has documented corrective/preventive-action and customer-complaint procedures with followed records, plus written procedures and records for assessing service capability. However, it has no overseas showroom, overseas agent or branch, or offline trade-show participation, so international service coverage is limited despite formal process evidence.

R&D capabilityInnovation resources appear limited: the supplier reports one R&D engineer, no new products in the previous year, and no available SDK. It does provide ODM and OEM services and undertakes customization, but the evidence does not demonstrate strong ongoing product innovation.

Production capacityThe supplier reports annual output capacities of 100,000 tons for castings, 30,000 tons for forgings, and up to 1,000,000 sets for machinery and E-V products, supported by 21–30 quality-control staff. However, the stated quantity and size of quality-control test equipment is zero, creating a clear production-quality control deficiency.

Customization capabilityThe supplier explicitly offers customization from samples, graphic or design inputs, and general customization, alongside ODM and OEM services for popular brands. These statements directly support capability for both customer-specified and original-design manufacturing.