the Bosch Expert CYL-9 MultiConstruction Drill Bit Set: Precision Perfected. With up to 5x more precision than standard bits, tackle drilling across multiple materials with ease. Experience maximum precision drilling, thanks to patented Bosch Centering Geometry ensuring accurate results every time. Begin drilling with confidence using the specially-designed centering tip for precise hole starts. Plus, the cylindrical shank is compatible with three-jaw drill chucks, offering versatility and convenience. Elevate your drilling game with this expertly crafted set, engineered for precision and performance.