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Point-to-cross sharpening : thinning of the drill tip.
TiAIN coating : TiAlN base, 2/4µm thickness, 3000HV hardness, 0.4 friction factor, heat resistance 900°C. Protects from abrasion, oxidation, adhesion.
3 flats shank : cylindrical shank with 3 flats at 120° for 3-jaw drill chuck.
High speed steel 5% Cobalt : HSS substrate enriched with 5% Cobalt. Better resistance to heat (toughness, sharpness of cut).
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