Perfect for applications including building site, home improvement projects, and garden installations, especially on challenging surfaces like concrete wall or stone This high carbon steel carbon drill bit set features a 1 / 4in hexagonal shank design for powerful drilling through concrete, cement, brick, and other hard materials, deeply holes up to 105mm efficiently Equipped with a unique triangular tip for flexible operate at various angles and wear resistant surfaces for enhanced durability, these masonry drill bits ensures reliability and easy installation Ideal for construction professional, renovation experts, and enthusiasts who need dependable and efficient drilling tool for demanding tasks With install hexagonal shank and versatile functionality, this concrete drill bit set provides seamless drilling across multiple scenarios for results, Manufacturer: YIGZYCN