Imperial - 1/2" Reduced Shank Drill Set HSS

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

About Metric Quick Silver M2 HSS Jobber Drills Din338

• 118° Split Point (crankshaft point).
• The split point is self-centering and reduces the need for end thrust.
• Friction at the workpiece is reduced.
• 118° point angles are ideal for use in materials such as mild steel and cast iron.
• The 118° point creates easily controlled chips that are wide and thin.

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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