Square end mill: The most common type with a straight bottom edge. Can be used for frontal cutting, side cutting for cornering, grooving, and hole cutting. The disadvantage is that a large load is placed on the outermost edge and it wears out easily.Commonly referred to as Flat End Mills, they are used for general milling applications including slotting, profiling, plunge cutting, and milling square shoulders. Square End Mills produce a sharp edge at the bottom of the slots and pockets of the workpiece. Flutes on each of the end mills' cutting heads carry chips away from the workpiece to prevent damage to the end mill or workpiece. Square end mills are used on CNC or manual milling machines.

1) Reduced Shank Square End Mill

2) Straight Shank Square End Mill

3) Long Neck Square End Mill