1-13/16" Diameter x 1/4" Thick, Series 3, Super Cobalt (T15) Spade Drill Insert TiN Coated

Increase wear resistance over M4 For use in medium carbon steel to high temperature Performs best in rigid setups Point Angle  - 132 degree, (Series 5-8 : 144 degree)

1-13/16" Diameter x 1/4" Thick, Series 3, HSS (M4) Spade Drill Insert TiN Coated

General purpose insert for most materials Not recommended for tool steels and high temperature alloys High toughness for loose or manual machines Point Angle  - 132 degree, (Series 5-8 : 144 degree)

1-3/8" Diameter x 3/16" Thick, Series 2, Carbide C5 (P40) Spade Drill Insert TiN Coated

Multipurpose GenometryIncrease wear resistance over M4 and T15For general use in carbon steel and alloy steelsPoint Angle  - 132 degree