Spiral step drills designed for drilling in high-grade stainless steel, structural and cold-rolled steel, non-ferrous metals, steel sheets, and plastics.

• made of high-speed steel HSS 4341, coated with titanium nitride to increase the drill bits' lifespan
• the edges of the drilled hole remain clean and burr-free
• automatic centering on rounded and slippery surfaces
• quick heat dissipation when drilling in hard materials
• 2 spiral chip grooves efficiently remove debris
• triangle tool holder ensures excellent attachment in the drill
• max. cutting thickness: 4 mm

Usage warnings: