The cobalt drills from the company Graphite are designed for drilling metals. They are made from high-speed steel, with 5% cobalt additives (HSS-Co). Their high mechanical and thermal resistance allows them to drill many types of metals, including stainless or heat-resistant steel. Their head has a 135° tip, capable of creating holes without the need for a pre-existing hole. They comply with DIN338 standards.

• Product code: 99998835, Diameter: 3 mm, Length: 61 mm, Effective length: 33 mm
• Product code: 99998836, Diameter: 3.5 mm, Length: 70 mm, Effective length: 39 mm
• Product code: 99998837, Diameter: 4 mm, Length: 75 mm, Effective length: 43 mm
• Product code: 99998838, Diameter: 4.5 mm, Length: 80 mm, Effective length: 47 mm
• Product code: 99998839, Diameter: 5 mm, Length: 86 mm, Effective length: 52 mm
• Product code: 99998840, Diameter: 6 mm, Length: 93 mm, Effective length: 57 mm
• Product code: 99998841, Diameter: 8 mm, Length: 117 mm, Effective length: 75 mm
• Product code: 99998842, Diameter: 10 mm, Length: 133 mm, Effective length: 87 mm