99-Piece Titanium-Coated HSS Twist Drill Bit Set – 1/16" to 1/4"

Tackle any drilling project with confidence using this comprehensive 99-piece high-speed steel (HSS) twist drill bit set. Featuring a titanium coating for superior anti-rust and wear protection, these bits are engineered for fast, clean drilling in wood, metal, plastic, aluminum, and more — no pre-drilling needed. Whether you're a weekend DIYer or a seasoned tradesperson, this set has the right bit for the job.

Key Features

99 Pieces in One Set: Covers a full range from 1/16" to 1/4" — sizes for virtually every common drilling task in one convenient kit.
Titanium-Coated HSS: High-speed steel construction with titanium coating delivers exceptional hardness, anti-rust protection, and extended service life.
No Pre-Drilling Required: Sharp, precision-ground tips allow drilling to start instantly with minimal walking or slipping.
Ultra-Low Friction: The titanium coating dramatically reduces friction and heat buildup, keeping your bits sharp and your workpieces clean.
Versatile Material Compatibility: Ideal for wood, plexiglass, hard plastics, aluminum, iron, and other metals.
CE Certified: Meets CE safety and quality standards for peace of mind.
DIY & Professional Use: Perfect for home improvement, general construction, engineering projects, and hobby/craft work.
Compatible Tools: Use with needle vice or low-speed electric drills (not intended for impact drills).

Bit Size Breakdown

This set includes multiple quantities of each size for maximum versatility and redundancy:

16 × 1.5 mm
16 × 2.0 mm
15 × 2.5 mm
10 × 3.0 mm
10 × 3.2 mm
8 × 3.5 mm
8 × 4.0 mm
3 × 4.5 mm
3 × 5.0 mm
2 × 5.5 mm
2 × 6.0 mm
2 × 6.5 mm
2 × 8.0 mm
2 × 10.0 mm

Specifications

Material: High-Speed Steel (HSS)
Coating: Titanium (anti-rust, wear-resistant)
Size Range: 1/16" – 1/4" (approx. 1.5 mm – 10 mm)
Pieces: 99
Certification: CE
Model: GZ039
Made in Mainland China

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For safety guidance on power tools and drill bits, refer to the U.S. Consumer Product Safety Commission (CPSC) Power Tools Safety Guide.

Frequently Asked Questions

Q: What materials can these titanium HSS twist drill bits drill through?

A: These high-speed steel twist drill bits are suitable for drilling wood, aluminum, iron, plexiglass, hard plastics, and most common metals. The titanium coating adds durability and reduces friction for cleaner, faster results across all compatible materials.

Q: Do I need to pre-drill a pilot hole before using these bits?

A: No! One of the standout features of this 99-piece drill bit set is that drilling can be started directly without pre-drilling. The precision-ground tips grip the surface immediately, making them efficient and easy to use.

Q: Can these drill bits be used with an impact drill?

A: These titanium-coated HSS drill bits are designed for use with a needle vice or low-speed electric drill. They are not recommended for use with an impact drill, as the high-impact force may damage the bits.

Q: How many bits are included and what sizes are in the set?

A: The set includes 99 drill bits ranging from 1/16" (1.5 mm) to 1/4" (10 mm). Sizes include 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.2 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 8 mm, and 10 mm, with multiple pieces of each size included for redundancy.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

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