Twist drill with long shank and specially ground roof-like tip which can be regrounded easily. Quality according to DIN 7490 and the valid safety regulations, For drilling of external and internal form boards in one single operation. Also for drilling in wooden ceilings and floors for installation work in old-building renovation, For hardest application or for drilling in metal material, HSS. 1600 - 3000 rpm. e.g. Ø 14 mm 2200 rpm in formwork panel