For extremely hard porcelain tiles with a Mohs/Ritz hardness of 9, as well as glass and porcelain, no cooling is required. This product is not suitable for percussion drilling and has no tapping difficulties. It features a center point for precise hole placement, a patented carbide insert, and a conically embedded cutting insert for increased breakage resistance and stability. The shortened neck reduces torsional forces, minimizes spring and chatter, and increases service life. The unique anti-slip shaft prevents spinning in the drill chuck and ensures optimum torque transmission. This set includes a PROFI BETON drill bit for finishing drilling after tile drilling in masonry.