Drill bit set AWTools AW42120 — 5 pieces

AWTools AW42120 — 5 pieces drill bit set contains five precision ground HSS-Co high-speed steel bits with 5% cobalt and a 135° centering point. Designed for general-purpose drilling, each two-cutting-edge bit is suited for use in standard drill chucks and comes stored in a compact case for organized transport and storage. The combination of cobalt alloy and precision grinding improves heat resistance and wear life, making the set suitable for repetitive tasks and replacement needs in workshops, construction sites, and DIY projects.

Advantages

The HSS-Co composition with 5% cobalt ensures higher red-hardness and thermal stability compared with standard high-speed steel, reducing wear during intensive drilling. Precision ground flutes and two cutting edges deliver consistent hole quality and smoother penetration. A 135° centering point improves bite control and reduces walking on the workpiece, particularly when drilling metals and plastics. The included case keeps bits protected and readily available, simplifying bit changes on the job.

Suitable for

• Drilling alloyed and unalloyed steels
• Working with grey cast iron
• Drilling non-ferrous metals such as aluminium and brass
• Making holes in plastic components
• General workshop, construction and DIY maintenance where spare bits are needed

Key specifications

• Material: HSS-Co high-speed steel with 5% cobalt
• Cutting geometry: two cutting edges, precision ground
• Point angle: 135° centering point
• Pieces in set: 5 drill bits
• Storage: supplied in a compact case
• Suitable for: alloyed/unalloyed steel, grey cast iron, non-ferrous metals, plastics

How to use

Secure the appropriate AWTools drill bit in a standard drill chuck and ensure it is properly tightened. Select an appropriate cutting speed and feed rate for the workpiece material to avoid overheating; use lower speeds for harder alloys and higher speeds for non-ferrous metals and plastics. Apply steady, controlled pressure and allow the bit to clear chips frequently. For metals, use suitable cutting fluid or lubricant to extend tool life and improve hole quality. After use, clean the bits and return them to the case for storage.

Usage recommendations

For best results when drilling steels and alloys, use cutting fluid and moderate speed to reduce heat buildup. When starting holes in smooth or flat stock, consider a center punch or pilot hole to prevent walking despite the 135° point. Inspect bits for wear and replace when edges become rounded or produce poor-quality holes.