High torsion, low breakage drill bits suitable for alloyed and non-alloyed steel up to a tensile strength of 900 N/mm², non-ferrous metals, cast iron and hard plastics. Rolled spiral flute and ground point with oxide coating allows rapid chip removal. Features 2 cutters and 2 flutes. Manufactured to DIN 338.
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Customer Reviews for Bosch HSS-R Drill Bit 5 x 86mm
"I am a professional machinist and bought 2 of these drills after wearing down my old one until it was 1" long. Both of them snapped within 2 minutes. They are designed to snap where the flute ends, and neither of them had been sharpened properly. Very poor value for money."