Screw Machine Drill, Parabolic, List Number 2175TA, Number of Pieces 1, High Performance Grade, Cobalt Steel, TiAlN Finish, Notched Point, Drill Point (Deg.) 135, Fractional Size (In.) 13/32, Decimal Equivalent 0.4062, Flute Length (In.) 1-15/16, Overall Length (In.) 3-5/16, Shank Dia. (In.) 13/32, For Chilled Cast Iron, High Speed Steels, High-Strength Alloy Steel, Stainless Steel And Tool Steel RestrictionsCalifornia Proposition 65 Warning: This product contains a chemical known to the State of California to cause cancer. High-Performance Parabolic Screw Machine Length Cobalt Drills, 135 For deep-hole drilling in a wide range of materials. Provide superior rigidity to minimize deflection. Parabolic flute form and point combination produces closer hole tolerances, heightened chip breaking, and improved coolant flow. Self-centering modified notch point prevents walking.Notched point Q-Cobalt Letter and metric sizes available at DrillSpot.com