Premium version, fully ground quality with 2 main cutting edges and 2 spurs. Inside specially ground spiral for a very good chip removal. For exact drilling in all, particularly hard wood materials. Also suitable for some plastics, like acrylic glass, Corian®®, GFRP, HPL coating, polycarbonate, PVC and Trespa® board. Premium quality at a fair price. Specially suitable for stationary use. For soft wood the cordless drill is only limited applicable, due to the low rotation speed. Here we recommend product lines 1591 with cylindrical shank or 1596/1597 with hexagonal bit shank.