Metric - 1/2" Reduced Shank Drill Set HSS

• Bordo Reduced Shank HSS Drills.
• 118° notched point 30° helix.

All About Drill Bit Surface Treatment

• Bordo reduced shank HSS drills are ground and then a black finish is achieved by steam tempering a thermal process resulting in a porous tool coating.
• This surface aids chip flow and heat dissipation.
• The drill is then ground a second time to achieve a bright finish on the shank and cutting edges.

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