Drill Bit Set Makita D-39992 5 pieces HSS

The Makita D-39992 5-piece HSS drill bit set contains five high-speed steel bits engineered for durability and precision. Each bit is ground to provide accurate centering and consistent cutting performance across a range of common materials. The set is compact for convenient storage and organized transport, and is intended for use with standard drills for home, workshop, and professional tasks.

Advantages

The HSS construction offers high wear resistance and maintains sharp cutting edges at elevated temperatures compared with carbon steel bits. Precision ground flutes improve chip evacuation and reduce friction, resulting in smoother drilling and prolonged tool life. The set format supplies a range of commonly used diameters so users can work without frequent bit changes, while the uniform shank design fits most standard chucks for quick bit swaps.

Suitable for

• Drilling small to medium holes in metal sheets and profiles
• Drilling into wood and wooden components
• Creating holes in plastics and composite materials
• General repair, assembly, and maintenance tasks

Key specifications

• Material: High-speed steel (HSS)
• Set size: 5 drill bits
• Flute type: Precision ground for efficient chip removal
• Shank: Standard straight shank compatible with common drill chucks
• Intended use: General purpose drilling in metal, wood, and plastic

How to use

Select the appropriate drill bit diameter for the required hole size and secure it in the drill chuck, ensuring proper tightening. Use the correct drill speed for the material — lower speeds for metal and higher speeds for wood — and apply steady, moderate pressure to avoid overheating the bit. For metal work, use cutting fluid or cooling to extend bit life and improve finish. Clear chips from the work area regularly to maintain drilling accuracy and safety.

Usage recommendations

Store the drill bits in their case to protect cutting edges and keep sizes organized. Replace worn or damaged bits to maintain drilling quality and reduce the risk of breakage. When drilling hard metals, use appropriate lubrication and controlled speeds to preserve bit hardness and prolong service life.