What surface coatings are available?

Available options include Bright, Titanium Coated, Black Oxide, Amber Color, Black & Gold, Black & Bright, and Rainbow.

What is the warranty or quality guarantee?

We implement strict quality control checks throughout the manufacturing process to ensure each drill meets rigorous standards for high strength, precision, and long life.

4-32mm Cobalt HSS Step Drill Bit for Metal and Plastic

Name: 4-32mm Cobalt HSS Step Drill Bit for Metal and Plastic
Brand: Zhejiang ZhengCheng lmport & Export Co.,LTD
SKU: 1923389946

Zhejiang, ChinaZhejiang ZhengCheng lmport & Export Co.,LTD

US$0.19-1.25

50 Piece

Sample price:US$1.50/piece.Request sample

Product profile

Customization

Available

Customized

Standard

GB/T

Model NO.

HSS M2/M35

Length

Standard Length

Type

Step Drill Bit

Material

High Speed Steel

Usage

Metal Drilling

Application

Stainless Steel/Mold Steel/Copper Alloy...etc

Unit Price

Customized Support

OEM, ODM

Size

4-32mm

Transport Package

Plastic Box or Your Requriement

Specification

According To The Order Requirements

Trademark

ZEICIN

Origin

China

HS Code

8207509000

Key features

High-Speed Steel Material: Made from premium HSS M2/M35 for excellent heat resistance and durability.

Versatile Surface Coatings: Available in Bright, Titanium, Black Oxide, Amber, Rainbow, and more.

Razor-Sharp Cutting Edge: High-hardness design ensures fast, smooth drilling with minimal wear.

Efficient Chip Removal: Fine spiral design ensures smooth debris clearance and efficient drilling.

OEM/ODM Customization: Accepts OEM customization with design team support for drawings or images.

Multi-Material Compatibility: Suitable for stainless steel, mold steel, copper, aluminum, and cast iron.

Anti-Slip Precision Design: Precise blade opening for accurate positioning and reduced slippage.

Strict Quality Control: Rigorous checks from raw materials to finished products ensure reliability.

Company profile

Zhejiang ZhengCheng lmport & Export Co.,LTD

Zhejiang, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2019-03-26Nearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤0.87hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, EXW, CIF

AI-Powered supplier vetting

SummaryThe supplier is a limited trading company with five employees, focused on steel raw materials, cutting tools, and plastic raw materials. It has self-operated import/export rights, six years of export experience, and exports reportedly account for 90% of total sales. The supplier offers OEM and ODM services, has introduced new products within the past year, and supports extensive customization from samples, designs, or full specifications. However, it has no available SDK, overseas showroom, overseas agents or branches, or offline trade-show participation. Service-management controls are weakly documented: no written corrective-action, complaint-handling, supplier-assessment procedures, or approved-supplier list were identified. Raw-material traceability, quality assurance, sustainability documentation, and fire-drill status remain unknown. A CTI audit record is provided for the period from 2025-05-10 to 2026-05-09, but the stated evaluation result is not interpretable without a defined scoring scale.

After-Sales capabilityThe supplier has no overseas showroom, agents, branches, or stated overseas service countries, and it has not participated in offline trade shows. It also lacks written complaint-handling and corrective/preventive-action procedures, while its service-capability assessment procedure has no written procedures or records, indicating limited documented after-sales infrastructure.

R&D capabilityThe supplier reports new products within the past year and offers ODM services, supporting some product-development capability. However, it reports no available SDK, so its innovation capability is evidenced for product development and design services but not for SDK-based technical integration.

Customization capabilityThe supplier explicitly provides customization from samples, customization from designs, full customization, minor customization, and flexible customization. These services are reported in multiple slices and directly demonstrate broad customization coverage.

Client casesThe supplier reports providing OEM services for well-known brands, which is direct evidence of at least one type of customer engagement. No brand names, project details, product quantities, performance records, or additional customer cases are provided.

Product Q&A

Q:Are you a manufacturer or a trading company?

Yes, we are a manufacturer specializing in the production of high-speed steel cutting tools, equipped with advanced international machinery.

Q:What is your delivery time?

The usual delivery time for standard products is 5-15 days after receiving the advance payment. For customized products, the delivery time is usually 15-30 days after receiving the advance payment.

Q:What is the shipping port?

We ship goods via the ports of Shanghai, Ningbo, or Yiwu, etc.

Q:Is the drill OEM available?

Yes, we accept OEM customization for our main products. Our factory has a qualified design team that can design products according to your drawings or images, and we will produce a sample for your approval before placing an order.

Q:What materials can this drill bit be used on?

It is suitable for various materials including stainless steel, mold steel, copper alloy, aluminum alloy, cast iron, and PVC.