Material Number 1245991ISO Catalog ID KSEM170R3WN20M[D1] Drill Diameter M 17 mm[D1MAX] Drill Diameter Maximum 17.5 mm[L4/D1] Length/Diameter Ratio 3[L] Overall Length 130 mm[L3] Flute Length 75 mm[L4] Maximum Drilling Depth 54 mm[L5] Drill Point Length 2.698 mm[LS] Shank Length 50 mm[D] Adapter / Shank / Bore Diameter 20 mm[SSC] Insert Seat Size 1