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cobalt-coated HSS Drill Bit Set - 19 Pieces £5.99 @ Lidl
cobalt-coated HSS Drill Bit Set - 19 Pieces  £5.99 @ Lidl

cobalt-coated HSS Drill Bit Set - 19 Pieces £5.99 @ Lidl

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Made from high-quality, cobalt-coated HS steel
Set supplied in a practical and robust carry case

1 Comment

Cobalt drills are normally made by incorporating the cobalt into the the high speed steel. These are merely coated with cobalt. Is that for functionality or marketing I wonder.
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