Tvardy HSS metal drill bit set 25 pcs 1.0–13.0 mm

Tvardy HSS metal drill bit set 25 pcs 1.0–13.0 mm contains a complete range of standard metric sizes for drilling precise holes in steel and other metals. The set includes twenty-five high-speed steel (HSS) twist drill bits from 1.0 mm up to 13.0 mm, packed for convenient storage and quick selection. HSS material offers good hardness and heat resistance for typical workshop and maintenance applications where reliable cutting performance is required.

Advantages

The HSS construction ensures improved wear resistance and thermal stability compared with carbon steel bits, allowing sustained drilling speed and longer tool life under moderate duty cycles. The set covers a wide progression of metric diameters so you can select the exact size needed without improvising or reaming. Bits are suitable for both ferrous and non-ferrous metals and are supplied in an organized case that protects cutting edges and simplifies transport.

Suitable for (tasks / use cases)

• Workshop drilling in mild steel, stainless steel, aluminum and similar metals
• Maintenance and repair tasks requiring different hole diameters
• Metal fabrication and fitting where metric drill sizes are needed
• DIY projects that involve drilling through metal sheets, profiles or plates

When it may not be suitable

This HSS set is intended for general-purpose metalworking and will not perform as well as carbide or cobalt drills on very hard alloys, cast iron with high hardness, or continuous high-speed production where extreme heat and wear are present. For masonry, tile, glass or wood-specific applications, bits designed for those materials are more appropriate.

Key specifications

• Material: high-speed steel (HSS)
• Quantity: 25 pieces
• Size range: 1.0 mm to 13.0 mm (standard metric increments)
• Tip type: twisted point for general metal drilling
• Storage: compact case for organized bit storage

How to use

Select the appropriate diameter from the case and secure the bit in a drill chuck rated for the bit shank. Mark and center-punch the workpiece before drilling to reduce walking. Start at low speed to establish the hole and increase speed moderately while applying steady pressure; use cutting fluid or lubricant when drilling steel to reduce heat and extend bit life. Withdraw occasionally to clear chips for deeper holes and avoid overheating. Follow the drill and machine manufacturer's safety guidelines while wearing appropriate eye protection.

What to consider before purchase

• Confirm the size range (1.0–13.0 mm) matches your required hole diameters
• Consider material compatibility—HSS is suitable for many metals but not the best choice for extreme production conditions or very hard alloys
• Check that your drill's chuck and rotational speed range are compatible with small and large metric bits

Usage recommendations

For extended tool life and consistent hole quality when drilling steel, use a suitable cutting lubricant, moderate speeds, and periodic chip clearing. Replace worn bits rather than forcing them to avoid workpiece damage and ensure accurate hole diameters.