The Stier Premium Spiral Drill Bit Set is a high-quality selection of 19 precisely ground drill bits, specifically designed for demanding applications in various materials. With a cobalt content of 5%, these drill bits offer increased wear resistance and are ideal for use in stainless steel, alloyed steel, non-ferrous metals, and hard plastics. The drill bits are manufactured according to DIN 338 standards and feature a cross-ground tip (Form C), ensuring improved chip removal and precise centering. The high heat resistance and toughness of the drill bits make them particularly suitable for use in drill stands or column drilling machines. The case provides organized storage and allows for quick access to the various drill diameters ranging from 1 mm to 10 mm. This set is a reliable choice for professionals in trades and industry who value performance and ergonomics.

• Cobalt content of 5% for increased wear resistance
• Cross-ground tip (Form C) for improved chip removal and precise centering
• Heat resistance up to 600 °C for demanding applications
• Suitable for stainless steel, alloyed steel, and non-ferrous metals up to 1,400 N/mm²
• Precisely ground according to DIN 338 for high quality and durability.