Titanium Nitride coating reduces friction and last longer, cutting edge stays sharper longer. Used in repetitive metal drilling with portable drills or stationary drill press. Jobber length.
Irwin Jobber Length Drill, Series: 639, 1/4 in Diameter, 4 in Overall Length, 2 Flutes, Spiral Flute, 2-3/4 in Flute Length, Straight Shank, 135 deg Point, Split Point, Clockwise Cutting Direction, High Speed Steel, Titanium Nitride Coated, Applicable Materials: Mild Steel, High Alloy Steel, Stainless Steel, Wood, Drywall, Sheet Metal, Cast Iron