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Buying Guide·Feb 3, 2026

DIN 338 vs DIN 340 vs DIN 345: Drill Bit Standards Decoded

DIN 338, DIN 340, and DIN 345 define the three most common HSS drill bit configurations. Learn what each standard specifies and how to choose the right one for your drilling application and equipment.

DIN standardsDIN 338DIN 340

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