The HSS Cobalt Fully Ground Drill Bit 4mm Pack of 10, Sealey Part No. DB040CB, is a high-performance tool designed for precision drilling in tough materials. Made from high-speed steel with 5% cobalt, these drill bits offer enhanced durability and heat resistance. They are fully ground to DIN 338 standards, ensuring a precise and efficient drilling experience. The 135-degree split point design allows for self-centring, reducing the risk of slipping and enabling easier penetration. Ideal for use with high carbon steel and stainless steel, these drill bits are a reliable choice for both professional tradespeople and DIY enthusiasts.

Key Features:
– Diameter: 4mm
– Pack of 10 drill bits
– Made from high-speed steel with 5% cobalt for increased lifespan
– Fully ground to DIN 338 standards
– 135-degree split point for self-centring and easier penetration
– Efficient swarf clearance to prevent clogging
– High-density case for safe and convenient storage

Typical Applications:
These drill bits are perfect for drilling into high carbon steel and stainless steel, making them suitable for a variety of construction and metalworking projects. They are an excellent choice for tradespeople and DIY users who require precision and reliability in their tools.

Also known as:
These drill bits are also referred to as cobalt drill bits, HSS cobalt bits, or simply metal drill bits, highlighting their versatility and essential role in any toolkit.

Product Specifications