Drill America m12 x 1.75 HSS 3 Flute Spiral Point Tap
 
Spiral-Pointed taps are also called machine taps, were originated to solve the problem of tap breakage in through hole tapping
Spiral point prevents tap breakage in through hole tapping
Shoots chips ahead of the cutting action reducing loading and clogging in the flutes
They are recommended for use in through or blind holes which allow for chip accumulation in the bottom of the hole
Ideal for threading a wide variety of ductile materials, copper and copper alloys, brass and non-metallics