Bosch - Cobalt drill bits set 25pcs

📏 Sizes Included

• 1.0 mm

• 1.5 mm

• 2.0 mm

• 2.5 mm

• 3.0 mm

• 3.5 mm

• 4.0 mm

• 4.5 mm

• 5.0 mm

• 5.5 mm

• 6.0 mm

• 6.5 mm

• 7.0 mm

• 7.5 mm

• 8.0 mm

• 8.5 mm

• 9.0 mm

• 9.5 mm

• 10.0 mm

• 10.5 mm

• 11.0 mm

• 11.5 mm

• 12.0 mm

• 12.5 mm

• 13.0 mm

🛠 Material & Build

• Material: High Speed Steel with 5% cobalt alloy (HSS-Co)

• Heat Resistance: Very high — retains hardness at elevated temperatures

• Finish: Gold oxide / bronze finish (varies by batch)

⚙️ Design Features

• 135° split point tip for accurate self-centering

• Reduced walking on metal surfaces

• Spiral flute design for efficient chip evacuation

• High torsional strength for tough drilling applications

🔧 Suitable Applications

• Stainless steel

• Alloy steel

• Mild steel

• Cast iron

• Sheet metal

• Hard plastics

Not recommended for masonry or concrete.