Irwin IRW10502399 HSS Pro 11.0mm Drill Bit – High-Speed Steel, Precision Ground (OL: 142mm, WL: 94mm) | 10502399

Irwin 10502399 HSS Pro 11.0mm Reduced Shank Drill Bit (DIN 338) – 142mm Overall, 94mm Working

Irwin 10502399 is an HSS Pro metal drill bit designed for clean, accurate drilling where dependable centring and consistent hole quality matter. With an 11.0mm cutting diameter and a reduced shank, it’s a practical choice for trade and workshop users drilling into metals and other common materials.

The IRW10502399 features a split-point geometry to help the bit start where you mark it, reducing wandering and supporting controlled drilling in typical jobsite and fabrication tasks.

Key Features

• HSS Pro construction: Built for general-purpose drilling performance in metalworking and workshop use.
• 118° split point: Helps improve centring and supports cleaner starts with less tendency to wander.
• DIN 338 pattern: Jobber-length format suited to a wide range of trade and industrial drilling tasks.
• 11.0mm diameter: Ideal for producing accurate holes for fixings, clearance drilling and fabrication work.
• Reduced shank (10mm): Enables use in drill chucks that accept up to 10mm shanks while still drilling 11.0mm holes.
• Balanced lengths: 142mm overall length with a 94mm working length for controlled drilling depth in many applications.

Specifications at a glance

Suitable applications

• General metal drilling in alloyed and unalloyed steel, non-ferrous metals and cast iron
• Plastics drilling where a controlled start and clean hole quality are important
• Workshop, fabrication and maintenance tasks requiring an 11.0mm hole from a 10mm chuck capacity