high-quality, long version in fully ground quality with 2 main cutting edges and 2 pre-cutters, deep hole spiral for very good chip transport, internally ground, CNC robotic grinding, for precise drilling in all, especially hard wood materials, also suitable for some plastics such as acrylic/Plexiglas, Corian®, FRP, HPL coating, polycarbonate, PVC, and Trespa®, best results for deep hole drilling, please do not use the drill in a hand drill for diameters below 8 mm due to the risk of breakage, if necessary, place the centering tip on the surface before starting the machine