Drill bit set Abraboro AB00010401 — HSS 4 mm, 10 pcs

Abraboro AB00010401 — HSS 4 mm, 10 pcs is a set of high-speed steel drill bits designed for drilling clean, accurate 4 mm holes in metal, wood and plastic. The set contains ten identical HSS bits that combine hardness and toughness typical for high-speed steel, providing stable cutting performance and resistance to normal wear in workshop, maintenance and DIY environments. These 4 mm drill bits are intended for use in hand drills and drill presses that support standard straight-shank bits.

Advantages

The HSS material offers an optimal balance of hardness and heat resistance for general-purpose drilling, enabling effective cutting in ferrous metals as well as non-ferrous materials. The uniform 4 mm diameter across the set ensures consistent hole sizes for repeatable results. Supplied as a pack of ten, the set reduces downtime by providing replacement bits when tips dull or break during routine tasks. The straight-shank design fits standard drill chucks without adapters.

Suitable for

• Drilling holes in mild steel, aluminum and other non-hardened metals
• Woodworking tasks requiring precise 4 mm holes
• Plastic and composite sheet drilling
• General maintenance, repair and DIY projects
• Use in portable hand drills and bench drill presses

Key specifications

• Drill type: twist drill bit
• Material: high-speed steel (HSS)
• Diameter: 4 mm
• Quantity in set: 10 pieces
• Shank type: straight round shank for standard chucks
• Typical applications: metal, wood, plastic

How to use

Select a drilling speed appropriate for the material being worked: lower speeds for harder metals and higher speeds for wood and plastics. Secure the workpiece and align the drill bit at the intended location. Use cutting lubricant or coolant when drilling metals to reduce heat and extend bit life. Apply steady pressure without excessive force; let the bit do the cutting. After use, inspect the tip for wear and replace with another bit from the set if the cutting edge is rounded or chipped.

Usage recommendations

For best results when drilling metal, use a suitable cutting fluid and moderate speed to reduce heat buildup. When drilling wood or plastic, higher speeds and minimal lubrication are appropriate. Store the bits in a dry place to prevent corrosion and keep spare bits available to maintain workflow during repetitive tasks.