What is the hardness of the drill bits?

The hardness is 62-66 HRC, made from High Speed Steel (HSS) or HSS Co.

Do I need to create a pilot hole before drilling?

No center punching or pilot hole drilling is required on most sizes.

3PCS HSS Step Tool Drill Bit Set

Name: 3PCS HSS Step Tool Drill Bit Set
Brand: Yueqing Hengda Tools Co., Ltd.
SKU: 933850305

Zhejiang, ChinaYueqing Hengda Tools Co., Ltd.

US$1.58

1,000 Pieces

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Customized

Non-Customized

Standard

DIN

Model NO.

SDB

Length

65-104 mm

Type

Core Drill Bit

Material

High Speed Steel

Usage

Wood Drilling, Metal Drilling

Shank Shape

Straight Shank, Hex Shank

Processing

Fully Ground

Flute Type

Straight, Spiral

Package

Plastic Box ,Cardboard

Transport Package

Carton

Specification

4-35 mm

Trademark

Leying

Origin

Zhejiang

HS Code

8207509000

Production Capacity

200000 Pieces/Month

Key features

Versatile Material Compatibility: Drills stainless steel, carbon steel, aluminum, alloy steel, cast iron, wood, and plastic.

High Precision HSS Material: Made of High Speed Steel with hardness 62-66 HRC for durability and sharpness.

No Pilot Hole Required: Drills round holes in metals up to 3.2mm thick without center punching or pilot holes.

Laser-Etched Size Markings: Hole sizes are permanently laser-etched in the flute areas for easy determination.

OEM and Customization: OEM available with label printing service; customization from samples, designs, or full customization.

Multiple Shank Options: Available in Straight Shank and Hex Shank configurations for versatile tool compatibility.

Fully Ground Processing: Fully ground processing ensures high precision and consistent performance across all steps.

Flexible Shipping Options: Supports express, air, and sea shipping via FOB Shanghai/Ningbo ports.

Company profile

Yueqing Hengda Tools Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2018-01-01 CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤9.25h

AI-Powered supplier vetting

SummaryThe supplier processes and sells hardware, electric tools, drill bits, woodworking and milling cutters, pneumatic tools, drilling machines, mechanical equipment, and building materials, with import and export activities. It reports six production lines, valid manufacturing contracts with associated subcontractors, in-stock capacity, and 11–20 quality-control staff. Customization and ODM services are available, and the supplier provides OEM services for well-known brands. Service-management procedures, complaint-handling procedures, corrective and preventive action procedures, and finished-product inspection instructions are documented and followed. However, no overseas warehouse or showroom is available, no new product was developed during the past year, continuous quantity reconciliation is not performed for each batch, and certification information, customer cases, and verified financial results are not provided.

Supplier typeThe supplier is a hardware and electric-tool manufacturer and trader covering drill bits, woodworking and milling cutters, pneumatic tools, drilling machines, mechanical equipment, and building materials. Its six production lines, manufacturing contracts with associated subcontractors, and stated in-stock capacity indicate a manufacturer with trading and outsourced-production capabilities.

After-Sales capabilityThe supplier has written and followed procedures for service-capability assessment, corrective and preventive actions, and customer complaint handling. It accepts multiple quotation and payment terms and reports lead times of within 15 workdays to one month, but it has no overseas warehouse or overseas showroom, which limits documented overseas service infrastructure.

Production capacityProduction evidence includes six production lines, 11–20 quality-control staff, in-stock capacity, valid contracts with associated subcontractors, and peak-season fulfillment within 15 workdays in one stated record. The supplier also has a standard operating procedure for outsourcing, although it does not continuously reconcile quantities for every batch or batch production.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also provides ODM services, directly supporting a broad customization and design-manufacturing offering.

Product Q&A

Q:Is OEM available?

Yes, OEM and customization are availble. Also, we can provide label printing service.

Q:Are samples available?

Yes, you can ask some samples for testing after confirming our prices, but please pay the freight fee, the fee will be returned to you after you making official order.

Q:What is your payment terms?

T/T,L/C,Paypal for different circumstances.

Q:What's your deliver way?

Express delivery, air shipping, sea shipping are available for your request.

Q:What's your delivery time?

Usual delivery time is 20-30 days after receiving the advance payment. For the customized product, the delivery time is 35-45 days after receiving the advance payment.