Premium Metal Drilling Bits & HSS Tools

High-performance industrial drill bits and diamond tools from ZHONGZUAN – China’s trusted manufacturer since 2001. Engineered for precision, durability, and unmatched cutting performance across metal, tile, concrete, and composites.

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15+

Years Experience

50+

Countries Served

10M+

Units Annually

99.3%

Customer Retention

About ZHONGZUAN

ZHONGZUAN (Chongqing) Precision Tools Manufacturing Co., Ltd. is a professional manufacturer of drill bits and diamond tools based in Chongqing, China. With over 15 years of expertise, we specialize in high-speed steel (HSS), cobalt, titanium-coated, and tungsten carbide-tipped tools designed for industrial, construction, and precision engineering applications.

Our mission is to deliver high-quality, reliable, and cost-effective drilling solutions that help our global partners increase productivity, reduce downtime, and expand their market reach.

ISO 9001 Certified Manufacturing
OEM/ODM & Custom Tooling Available
In-House R&D and Quality Control
Exported to 50+ Countries Worldwide

Our Premium Products

From high-speed steel twist drills to diamond core bits and carbide-tipped hole saws, our full range is engineered for maximum durability, precision, and performance in industrial and construction environments.

HSS Twist Drill Bit DIN1897

High-speed steel twist drill with parallel shank, ideal for drilling wood, plastic, and soft metals. Precision-ground cutting edges for clean holes.

Model: H-001 Min Order: 1000 pcs

DIN338 Left Hand Metal Drilling Bit

Titanium-coated HSS twist drill with left-hand rotation. Perfect for extracting broken screws and specialized machining applications.

Model: A-007 Min Order: 100 pcs

Tungsten Carbide Tipped Annular Cutter

50mm TCT broach slugger core drill for fast, burr-free hole cutting in steel, stainless, and alloy metals. No pilot hole required.

Model: T-005 Min Order: 500 pcs

Carbide Tip Tile Drill Bit

Triangle-point glass and tile hole cutter with carbide tip. Designed for drilling ceramic, porcelain, and glass without cracking.

Model: G-03 Min Order: 100 pcs

HSS Step Drill Bit Cone Cutter

13mm metric straight groove step drill bit for aluminum alloy and thin metal sheets. Multi-diameter drilling in one pass.

Model: B-14 Min Order: 50 pcs

M35 Cobalt Spiral Flute Step Drill Bit

High-performance cobalt alloy step cone drill bit for stainless steel and hardened metals. Resists heat and wear.

Model: H-001 Min Order: 50 pcs

M42 Cobalt HSS Bi-Metal Hole Saw

Bi-metal hole saw for plumbers and metal fabricators. High cobalt content ensures long life in tough materials.

Model: B-14 Min Order: 500 pcs

Electroplated Diamond Core Bit

4-inch diamond hole saw for concrete, granite, and masonry. CE certified, rust-resistant, and wearproof for long service life.

Model: G-16 Min Order: 300 pcs

View Full Product Catalog

Why Choose Us?

Quality Guaranteed

ISO-certified production with strict quality control at every stage. Every tool is tested for hardness, sharpness, and durability.

High Performance

Engineered with advanced materials like M35, M42 cobalt, and TiN coatings for faster drilling, longer life, and reduced heat buildup.

Competitive Pricing

Direct factory pricing with no middlemen. High volume production allows us to offer premium tools at competitive rates.

Global Support

Serving customers in over 50 countries with fast shipping, technical support, and responsive customer service.

Frequently Asked Questions

What materials are your drill bits made from?

Our drill bits are made from high-speed steel (HSS), M35 and M42 cobalt alloys, titanium nitride (TiN) coated steel, and tungsten carbide for extreme durability.

Do you offer OEM/ODM services?

Yes, we provide full OEM and ODM services including custom branding, packaging, and tool specifications tailored to your requirements.

What is the minimum order quantity (MOQ)?

MOQ varies by product, ranging from 50 to 1000 pieces. Contact us for specific product MOQs and bulk pricing.

How do I place an order?

Visit metaldrillingbit.com to browse products and request a quote. Our team will respond within 24 hours.

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