Drill bit set Proline 7.1 mm HSS metal, 10 pcs

Set of 10 Proline HSS drill bits, each 7.1 mm in diameter, designed specifically for drilling metal. The high-speed steel (HSS) construction delivers wear resistance and maintains cutting performance during repetitive use. These drill bits are intended for common metalworking tasks on sheet metal, mild steel and other metallic materials, and are compatible with handheld drills and drill presses for fabrication, repair and maintenance operations.

Advantages

The HSS material offers good hardness and heat resistance for consistent drilling performance and longer service life compared with general-purpose carbon bits. Precision-ground tips ensure stable cutting and predictable chip removal, resulting in cleaner holes with reduced burring. A uniform 7.1 mm diameter across all ten pieces simplifies tool selection for repeated hole-making tasks and reduces downtime for bit changes. The set format provides multiple spare bits for repetitive work or small projects.

Suitable for

• Drilling through sheet metal and thin steel plates
• Maintenance and repair tasks on metal components
• Fabrication work using handheld drills or drill presses
• Repeated production of 7.1 mm holes in workshop or site environments

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 7.1 mm
• Quantity: 10 pieces
• Application: Metal drilling (sheet metal, mild steel, other metallic materials)
• Compatibility: Handheld drills and drill presses
• Tip style: Precision-ground for stable cutting

How to use

Secure the workpiece to prevent movement and select an appropriate drill chuck that accepts the 7.1 mm shank. Use a suitable cutting speed for metalwork—moderate RPMs for larger diameter bits—and apply steady, even pressure without forcing the bit. For thicker or harder metals, use cutting fluid or lubricant to reduce friction and heat buildup and withdraw the bit periodically to clear chips. After drilling, deburr the hole edges as needed.

Usage recommendations

For best results, start with a pilot hole when working in thicker or hard metals, maintain appropriate rotational speed for a 7.1 mm HSS bit, and use cutting fluid when drilling stainless or hardened steels. Inspect bits regularly for wear and replace them when tip geometry degrades to preserve hole quality and minimize workpiece damage.