General description The Wall Hole Saw Drill Bits with Center Drill is a 65mm carbide concrete core drill bit designed for efficient drilling in various materials such as brick, stone, cement, and concrete. Made from high-quality carbide tipped metal, this drill bit is stable, durable, and ensures a long service life. Technical specifications Diameter: 65mm Material: Carbide tipped metal Usage Ideal for opening red brick walls, rammed earth walls, cement walls, foam bricks, and masonry walls. Commonly used for the installation of air conditioners, oil fume extractors, and sewer pipe holes. Other information Features two large chip openings for smoother chip removal and higher drilling efficiency. Utilizes high-frequency welding technology for sturdy and precise construction.