21mm Diameter x 4mm Thick, Series 1, HSS (M4) Spade Drill Insert Hardslick 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)

21mm Diameter x 4mm Thick, Series 1, HSS (M4) Spade Drill Insert TiAlN 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)

21mm Diameter x 4mm Thick, Series 1, 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)