What is the material of the drill bits?

The drill bits are made of High Speed Steel (HSS) grades 4241 and 6542.

Which ports do you ship from?

We ship from Shanghai Port and Ningbo Port.

Do you perform quality inspection?

Yes, we conduct 100% visual inspection on finished products with traceable raw materials.

Premium High-Speed Steel Step Drill Bit Set for Metalwork

Name: Premium High-Speed Steel Step Drill Bit Set for Metalwork
Brand: Jiangsu Borui Tools Co., Ltd.
SKU: 2191958425

Jiangsu, ChinaJiangsu Borui Tools Co., Ltd.

US$1.50-2.90

100 Pieces

Sample price:US$5.00/piece.Request sample

Product profile

Customization

Available

Customized

Standard

DIN

Length

Metric

Type

Twist Drill Bit

Material

High Speed Steel

Usage

Metal Drilling

Shank

Hex Shank

Transport Package

Single Packing with PVC Plastic Tube

Specification

4-12mm 4-20mm 4-32mm 4-38mm

Trademark

SUBORUI

Origin

China

HS Code

8207509000

Key features

High Speed Steel Material: Constructed from HSS 4241 and 6542 for superior durability and cutting performance.

Hex Shank Design: Features a hex shank type for secure grip and efficient torque transmission.

Wide Size Range: Available in multiple step sizes ranging from 4mm to 38mm for various drilling needs.

Straight Flute Type: Equipped with straight flutes to ensure smooth chip removal and precise drilling.

ISO9001 Certified: Manufactured under ISO9001:2015 standards ensuring consistent quality and compliance.

Full Customization: Offers full customization, minor customization, and options from samples or designs.

18 Years Expertise: Backed by 18 years of precision excellence in manufacturing twist drill bits.

Global Standards Compliance: Certified with CE, RoHS, BSCI, and ICS standards for international market access.

Company profile

Importers and ExportersStandardized quality controlProduct CertificationHigh Repeat Buyers Choice

Jiangsu Borui Tools Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 8 Years CertifiedNearest Port: Shanghai Port, Ningbo PortAverage Response Time: ≤2.27h

AI-Powered supplier vetting

SummaryThe supplier demonstrates R&D, customization, and export capabilities. It offers 3D design, ODM, sample- and design-based customization, full customization, and minor customization, with new products developed during the past year. R&D audit documentation is available, and technical engineers support production and after-sales activities. Quality evidence includes CE certification, ISO 9001:2015, BSCI, documented finished-product inspection procedures, and a stated 100% pre-shipment inspection process. The supplier has exported for eight years, with exports accounting for 71%–90% of total sales, and holds self-operated import/export rights. Overseas infrastructure is limited: it has no overseas warehouse, showroom, agents, or branches, and reports overseas services only as training. Financial credibility cannot be determined because the provided slices contain no assessable financial results or capacity data. Production scale and named customer cases are also insufficiently documented. Digital operational...

Supplier typeThe supplier is positioned as an R&D-oriented OEM/ODM manufacturer offering 3D design and multiple customization models, including sample-based, design-based, full, and minor customization. Its stated services cover prototyping through mass production for OEM/ODM projects, while it does not provide OEM services for popular brands.

CertificationsThe supplier reports CE product compliance certification, an ISO 9001:2015 management-system certificate, and BSCI social-responsibility certification. The company description also states ISO 9001-certified processes, supporting a documented quality-management position.

After-Sales capabilityTechnology engineers provide technical support for production and after-sales service, and the supplier identifies training as an overseas service offering. However, it has no overseas warehouse, showroom, agent, or branch, so the evidence supports technical after-sales assistance but not a broad local overseas service network.

R&D capabilityThe supplier reports R&D engineers responsible for confirming requirements, designing products, and providing technical support; it has available design-input, output, review, verification, and validation documentation; and it developed new products during the past year. The company also states it has over 20 patented technologies, although no patent details are provided, and it does not have an available SDK.

Production capacityThe supplier states that its engineers support production, uses documented and uniformly followed finished-product inspection instructions, and claims 100% pre-shipment inspection. It also reports written procedures and records for assessing service-capable suppliers, but the provided slices do not establish production capacity, equipment, factory scale, or throughput.

Customization capabilityCustomization capability is explicitly broad: the supplier offers customization from samples, customization from designs, full customization, minor customization, 3D software design services, and ODM services. Its company description further states that OEM/ODM support spans prototyping to mass production.