PRECISION CUTTING EDGE: Starrett's HSS drill bits set offer fast drilling and perfect finishing with sharp and precise cutting edges. Achieve professional results with ease thanks to their maximum accuracy and performance during drilling operations. SPLIT POINT 135°: These Starrett's drill bits kit has 135° split point design that ensures precise and self-centering drilling, with reduced pressure required for penetration. This enhances performance and safety, and prevents slipping during drilling. SUITABLE FOR: These Starrett drill bit can drill alloy steels, carbon steels, cast iron, hardened alloys, stainless steel, wood, and soft materials, making them versatile for professionals working on various surfaces. DIN 338 STANDARD: Our metal drill bits meet DIN 338 Standards, made of high-speed steel with precise cutting geometry and wide channels for maximum performance, endurance, and fracture resistance in drilling. HIGH-ROTATIONAL ACCURACY: Starrett's wood drill bits offer high rotational accuracy due to their precise concentricity, and reduce deviation with their split point design. This ensures consistent and accurate drilling, crucial for professional results.