What payment terms do you accept?

We accept 30% advance payment and 70% balance payment, as well as LC, T/T, and D/P.

What is the warranty policy for damaged goods?

We provide free replacement for any damaged goods.

Does the factory have quality certifications?

Yes, our factory conforms to ISO9001-2000 quality control system and follows EN standards for inspections.

Professional Granite Diamond Core Drill Bit

Name: Professional Granite Diamond Core Drill Bit
Brand: DONGYAN INTERNATIONAL CO., LTD.
SKU: 2025410145

Jiangsu, ChinaDONGYAN INTERNATIONAL CO., LTD.

US$20.00

100 Pieces

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

Customized

Standard

ISO2000:9001

Model NO.

DY-09

Length

100mm

Type

Core Drill Bit

Material

Diamond

Usage

Masonry Drilling, Granite or Wall Drilling

Advantage

Fast Cutting Speed

Color

as Your Requirements

Sample Cost

Free

Sample Production Time

5-7days

Bulk Order Time

20-25days

Payment Term

30% Advance, 70% Balance

Industry Experience

8 Years

Transport Package

Blister Package, White Box

Specification

10-100mm

Trademark

DY-Tools

Origin

Jiangsu Province, China

HS Code

8207191000

Production Capacity

5000/Month

Key features

Vacuum Diamond Slot Technology: Enables fast drilling on granite, marble, limestone, and other hard stone materials.

High Efficiency Cutting: Sharp head design with large displacement for fast chip removal and easy operation.

Durable Diamond Material: Excellent diamond composition improves sharpness and wear resistance of the drill bit.

Free Sample Availability: Customers can request free samples to test product quality before bulk orders.

Customized Color Options: Color can be customized to meet specific customer requirements.

ISO Quality Certification: Factory strictly conforms to ISO9001-2000 quality control system with EN standard inspections.

Fast Sample Production: Sample production time is 5-7 days for quick evaluation and testing.

Comprehensive After-Sales Service: Includes free replacement of damaged goods and free new packaging design.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceExhibition Experience

DONGYAN INTERNATIONAL CO., LTD.

Jiangsu, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 14 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤15h CertifiedTerms of Payment: T/T, LC, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is a small trading company in Wuxi, China, focused on hardware tools and related product sales. It has five employees, one R&D engineer, no cooperative suppliers reported, and no stated manufacturing capability. Customization is offered across samples, designs, full and minor customization, and the company reported new products during the past year, but it does not provide ODM services or OEM services for popular brands and has no available SDK. Service procedures, complaint handling, and corrective/preventive-action procedures are documented with follow-up records, although the approved-supplier list lacks approval signatures or dates. An audit by TUV Rheinland is reported as valid from June 30, 2026 to June 29, 2027, but the evaluation result is recorded as 0 without interpretation. Quality-assurance and traceability status are unknown, and no quality-control test equipment is reported. Financial records are indicated for 2023–2025, but no financial performance conclusion is possible from...

Supplier typeThe supplier is explicitly identified as a trading company and limited company located in Wuxi, China, with five employees and no reported affiliation with a larger group. Its stated activities center on sales and wholesale of hardware tools, machinery, hardware and electrical appliances, construction materials, and related goods, indicating a small independent trading profile rather than a manufacturing entity.

After-Sales capabilityThe supplier has a documented service-capability assessment procedure with follow-up records, a corrective and preventive action procedure with records, and a clear customer-complaint procedure with follow-up records. However, the approved-supplier list lacks approval signatures or dates; this does not directly negate complaint or service handling, but it indicates an administrative control weakness.

R&D capabilityThe supplier reports at least one new product during the past year and has one R&D engineer, supporting some product-development activity. Nevertheless, it has no available SDK, does not provide ODM services, and the limited staffing indicates only modest documented R&D capacity rather than a strong innovation platform.

Customization capabilityThe supplier explicitly offers customization from samples, designs, full customization, minor customization, and flexible customization. It also reports new products during the past year, although no ODM service, SDK, or detailed engineering resources beyond one R&D engineer are available.