An end milling operation can produce a variety of features, including profiles, slots, and pockets. A profile is a peripheral cut along an external or internal edge of the workpiece with a length equal to the complete perimeter, just one side, or even a part of a side. A slot is a slot cut in the workpiece that can form a complete loop, run through two sides, run through one side, or be contained. Profiles and slots can be machined with multiple steps and by following straight or curved paths. A pocket is a contained feature of any shape that can be machined by either peripheral or slot cuts. Four possible pocket shapes include a cuboid, pyramid, cylinder, and cone. An end milling operation is capable of producing any custom shape, however the total cut length must be known in order to estimate the cost.