Bosch PRO 4.0mm x 75mm Stainless Steel HSS-Co Twist Drill Bit

The Bosch PRO Stainless Steel HSS-Co Twist Drill Bit is a high-performance drill bit engineered for professionals and serious DIYers who need precise, long-lasting performance when working with tough metal materials, especially stainless steel.

Built to the exacting standards of Bosch’s PRO range, this twist drill bit combines advanced material engineering with thoughtful design features that help you drill clean, accurate holes with minimal effort - even in demanding construction, fabrication and installation tasks.

At the heart of this bit’s performance is its premium high-speed steel (HSS) reinforced with cobalt (HSS-Co) alloy construction. The cobalt addition increases heat resistance and wear strength compared with standard HSS bits, meaning it stays sharper for longer and resists premature dulling when drilling through stainless steel, hard steel and other challenging metals.

This makes it well-suited for pre-drilling holes for anchors, rivets, bolts and fixtures in metalwork and structural applications.

The bit features a centring tip which helps start holes precisely where you need them without wandering - a common issue when working on smooth or polished metal surfaces. This improves accuracy, reduces the chances of mistakes and helps you maintain productivity on the job.

Its cylindrical shank is compatible with standard three-jaw drill chucks, so it fits a wide range of rotary drills and drill drivers with ease.

With robust construction and Bosch’s quality engineering behind it, this PRO Stainless Steel HSS-Co Twist Drill Bit is an excellent choice for construction workers, installers and metalworkers who demand long-life performance and dependable results from every drill bit in their kit.

Whether you’re preparing stainless steel profiles, frames or heavy-duty fixings, this bit provides the strength and precision you need.