Hi Andy,

If you mean the terms 'pocket' 'drilling' and 'profile' then they are as follows:

profile: this means to cut around the inside, outside, or on the line of a shape. For example, cutting a big hole out of something you need to set the profile depth to slightly more than the workpiece thickness (use a spoil board under the workpiece). For an 18mm workpiece I would set this to 19mm.

drilling: drilling a hole to a certain depth. You can also 'peck drill' where the drilling is done is stages, withdrawing the tool to clear swarf periodically

pocket: these are areas of flat recessed material, but not all the way through. For example, to countersink a hex bolt head you want a flat bottomed hole or 'pocket'. These can be any shape usually, but the s/ware above is asking about specific circle or rectangular shapes.

Does this help?