Bosch PRO 25 Piece HSS-Co Drill Bit Set

The Bosch PRO 25 Piece HSS-Co Drill Bit Set is a professional-grade cobalt twist drill bit set designed specifically for drilling in stainless steel and other hard metals.

Manufactured from premium high-speed steel blended with 5% cobalt (HSS-Co), these bits deliver exceptional heat and wear resistance — essential when working with tough materials like stainless steel. The ground finish further enhances durability, helping the bits maintain their edge through repeated use on site.

Each bit features a precision centring tip that allows you to start holes exactly where needed, reducing wander and improving accuracy. This makes the set particularly well suited to construction workers, installers, and metalworkers who need consistent, clean results across a full range of diameters. The cylindrical shank is compatible with standard three-jaw drill chucks, ensuring straightforward fitment with most corded and cordless drills.

Covering 25 diameters from 1mm through to 13mm in 0.5mm increments, this set provides a comprehensive range for a wide variety of drilling tasks. Supplied in a ProBox storage case measuring 200 x 115 x 58mm, the bits are easy to organise and transport between jobs.

Features and Benefits:
• HSS-Co construction — high-speed steel with 5% cobalt for superior heat and wear resistance
• Precision centring tip for accurate hole starts and reduced wander
• Ground finish for long-lasting sharpness and extended service life
• Cylindrical shank compatible with standard three-jaw drill chucks
• 25-piece set covering 1mm to 13mm in 0.5mm increments
• Supplied in a ProBox storage case for organised, on-site transport
• Conforms to DIN 338 standard

Specifications:
Diameters included (mm): 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13
Total lengths (mm): 34, 40, 49, 57, 61, 70, 75, 80, 86, 93, 93, 101, 109, 109, 117, 117, 125, 125, 133, 133, 142, 142, 151, 151, 151
Working lengths (mm): 12, 18, 24, 30, 33, 39, 43, 47, 52, 57, 57, 63, 69, 69, 75, 75, 81, 81, 87, 87, 94, 94, 101, 101, 101
Net weight: 1.045kg
Case dimensions: 200 x 115 x 58mm
Standard: DIN 338

Contents:
25-piece HSS-Co ProBox metal drill bit set (cobalt alloy), DIN 338
Diameters (mm): 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13
Working lengths (mm): 12, 18, 24, 30, 33, 39, 43, 47, 52, 57, 57, 63, 69, 69, 75, 75, 81, 81, 87, 87, 94, 94, 101, 101, 101