DESIGN: With two cutting edges and one centring point, Starrett SDS drill bits set deliver fast and efficient drilling with hammer action, thanks to its 130-degree tip angle. STRONG & DURABLE: Starrett SDS plus drill bits kit is specially heat-treated for superior strength, making it capable of withstanding the most demanding applications with ease. CARBIDE TIPS: These drill bits come with high-performance carbide tips that feature a unique two-channel design and chip removal/breakage accelerator. This design ensures optimal performance and long-lasting durability. FAST MATERIAL PENETRATION: This carbide drill bit's special flute geometry is designed to deliver fast material penetration and maximum debris removal, allowing for efficient and precise drilling. PRECISION GROUND: These SDS drill bits carbide tips are precision ground, ensuring consistent and reliable performance, no matter the application.