29pcs HSS Drill Bit Set Construction Concrete Drilling Inch Metric Sizes 5mm Diameter Fully Ground Enclosed Metal Box Coating

The 29PCS HSS Drill Bit Set is designed for construction and concrete drilling applications, offering both inch and metric sizes to meet international market requirements. Manufactured from high-speed steel (HSS) with a fully ground process, these drill bits deliver excellent cutting performance, accuracy, and durability.

Packed in a heavy-duty enclosed metal box, this set is ideal for professional contractors, workshops, and industrial users who require reliable and organized drilling solutions.

• 29-Piece Complete Set

  Covers commonly used inch and metric sizes, suitable for various drilling needs.

• High-Speed Steel (HSS) Material

  Ensures high hardness, wear resistance, and stable performance.

• Fully Ground Design

  Provides better concentricity, sharper cutting edges, and smoother drilling.

• Suitable for Construction & Concrete

  Ideal for drilling concrete, masonry, brick, and general construction materials.

• Protective Coating

  Improves corrosion resistance and extends tool life.

• Enclosed Metal Storage Box

  Strong, durable, and easy to organize and transport.

• Material: High-Speed Steel (HSS)
• Process: Fully Ground
• Sizes: Inch & Metric Mixed Sizes
• Common Diameter: 5mm (included)
• Coating: Surface coating for wear and corrosion resistance
• Package: Enclosed metal box
• Quantity: 29 PCS / Set

• Construction drilling
• Concrete and masonry work
• Brick and wall drilling
• Industrial and workshop use
• Maintenance and installation projects

• Wide size coverage for global markets
• High precision drilling with reduced vibration
• Long service life and consistent performance
• Professional packaging for safe storage and transport

• Specially designed for aluminum alloys: Optimized blade angle prevents aluminum chips from sticking
• External cooling support: High cooling efficiency prevents thermal deformation and tool wear
• Superior chip removal: Large tooth pitch and deep chip removal grooves enable smoother cutting
• High wear resistance: AMG hard alloy forging balances sharpness with extended service life