This professional 2-piece rotary hammer drill bit set delivers exceptional performance for demanding masonry projects. Each bit measures 14mm (approximately 5/9 inch) in diameter and 200mm (7.87 inches) in length, making them ideal for creating precise holes in concrete, brick, cement walls, stone, and other tough masonry materials. The cross-type double thread design with carbide-tipped construction ensures superior durability and cutting efficiency, even in the most challenging applications. The SDS shank fitting provides secure attachment and optimal power transfer to your rotary hammer drill, while the spiral flute design efficiently evacuates debris during operation to prevent binding and maintain smooth drilling action. Whether you're installing anchors, running electrical conduit, or tackling general construction tasks, these bits offer the reliability and precision that professionals demand. The 2-piece configuration provides excellent value, giving you a spare bit for continuous work or replacement when needed. Suitable for both professional contractors and dedicated DIY enthusiasts who require dependable tools for masonry drilling applications.