FAMAG 39mm Boarding and plumbing auger OAL400mm Cutting Length 370mm, 1001439 - 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 drilling in metal material, we recommend our version in HSS, product line 1002. Chrome vanadium steel 800 - 2500 rpm, e.g. Ø 10 mm 2500 rpm in formwork panel