15-piece ProBox HSS-Co 1-13mm metal drill bit set Bosch 2608587018

The set consists of 25 HSS-Co metal drill bits with diameters:

• 1.0 mm working length 12 mm (max. 4,500 rpm)
• 2.0 mm working length 24 mm (max. 4,500 rpm)
• 2.5 mm working length 30 mm (max. 3,000 rpm)
• 3.0 mm working length 33 mm (max. 3,000 rpm)
• 3.5 mm working length 39 mm (max. 3,000 rpm) rpm)
• 4.5 mm working length 47mm (max. 2,000 rpm)
• 5.0 mm working length 52mm (max. 2,000 rpm)
• 6.5 mm working length 63mm (max. 1,500 rpm)
• 7.0 mm working length 69mm (max. 1,500 rpm)
• 8.0 mm working length 75mm (max. 1,500 rpm)
• 9.0 mm working length 81mm (max. 1,000 rpm)
• 9.5 mm working length 81mm (max. 1,000 rpm)
• 11.0 mm working length 94mm (max. 900 rpm)
• 12.0 mm working length 101mm (max. 900 rpm)
• 12.5 mm working length 101mm (max. 900 rpm)

HSS-Co drills are made according to DIN 338 from high-speed steel HSS-E (SK5 M) with the addition of 5% cobalt. This allows them to achieve increased cutting efficiency and greater temperature resistance.

Narrow blade grinding tolerances ensure the highest accuracy in hole making. The drill's self-centering properties, thanks to the cross-ground blade, eliminate the need for center punching when drilling holes up to 10 mm in diameter.