1/4 Inch to 1-3/8 Inch Titanium Coated Step Drill Bit 9mm Round Shank

10 hole bit sizes:

1/4"

3/8"

1/2"

5/8"

3/4"

7/8"

1"

1-1/8"

1-1/4"

1-3/8"

With 1/8 inch increments

3/8 inch Shank

Heat Treated HSS with Titanium Nitride Coating
 

No need for a pilot hole.

Titanium coated to reduce friction and run cooler.

Automatically deburr holes as you drill.

High speed steel,durable.

Widely used to cut holes in a variety of material like steel, wood, thin iron, aluminum alloy, insulation boards, PVC sheet,ect.