IRWIN 10502546 3.5 x 70 mm HSS DIN 388 Cobalt Drill Bit

The Irwin HSS Cobalt Drill Bit is designed for drilling into tough materials such as stainless steel and high-alloy metals. With a diameter of 3.5 mm, it provides precise hole creation and durability suitable for both professional trades and DIY projects. The bit is made from high-speed steel containing 5% cobalt, which enhances heat resistance and extends life under demanding usage. It features a 135° split point to aid centering and reduce drilling pressure, and a gold tempered surface finish that helps resist rust and corrosion. Overall, the bit combines robust construction with practical design details to support accurate drilling in a variety of metalworking tasks, and is compatible with standard drills and drill drivers. This model has a working length of 39 mm and an overall length of 70 mm, making it a compact, high-performance option for metal drilling.

Features

• Diameter 3.5 mm
• Working length 39 mm
• Overall length 70 mm
• 5% cobalt HSS composition
• 135° split point for centering
• Compatible with standard drills and drivers