Premium quality version, extra long, fully ground quality with two main cutting edges and two taper taps. Internally ground special spiral for very good chip removal. For exact drilling in all, particularly hard materials. Also suitable for some plastics, such as acrylic glass, Corian®, GFRP, HPL coating, polycarbonate, PVC and Trespa® board. Specially designed chip flutes guarantee a good chip removal, you receive best results when drilling deep holes. Please do not use drills with a smaller Ø than 8 mm in the power drill, it might break. Premium quality at a fair price. Optionally put the brad point on the surface. HSS-G 2500 - 4000 rpm e.g. Ø 5 mm 4000 rpm in European hard wood. Smaller Ø with long OAL should be used with less speed