Tool specially matched to drilling holes without through-coolant. Concave major cutting edges and a special flute profile ensure a good chip evacuation. The sturdy cutter geometry with special point geometry and 4 cutting edges ensures drilling with good process reliability. A wide range of applications in steel materials thanks to a combination of tough ultra-fine grain carbide and extremely wear-resistant and heat-resistant coating.Flute length LC = L2 + 1.5 x DC. Through-coolant: no Standard: DIN 6537 Tolerance nominal dia : m7 Number of cutting edges Z: 2 Tolerance nominal dia : m7 recommended maximum drilling depth L2: 42.3 mm Overall length L: 91 mm Shank dia Ds: 8 mm Feed f in steel < 900N/mm2: 0.18 mm/rev.