3-piece VARIO twist drill set with the sizes #F, 5/16"and 27/64". High strength tool steel for long tool life (64 HRC), special impact wrench-compatible cutting geometries, and a TiAIN (titanium-aluminum-nitride) coating. The insert tools feature low wear and low friction and are heat-resistant. As a result, they can be used at high speeds and impact in high strength steel (up to 130 ksi).|Optimally suitable for the following material: unalloyed and alloyed steels of up to 130 ksi, aluminum, and brass.
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