5.5 x 139 x 91 mm powerful twist drill in long version. Suitable for deep drilling work in generally common materials. High breakage resistance. For deep hole drilling, smaller feeds and more frequent chip evacuations are necessary. Applications: for steel and cast steel, alloyed and unalloyed (up to approx. 900 N/mm² strength), grey cast iron, malleable cast iron, nodular cast iron, die cast iron, sintered iron, nickel silver, graphite, short-chipping aluminium alloys, bronze and brass.