extrude ####distance
This command allows the user to project a face(####) of an arb being edited a normal distance to create a new arb. The value of "face" is 4 digits such as 1256. If the face is projected in the wrong direction use a negative "distance". One common use for this command is for producing armor plates of a desired thickness.
Examples:
extrude 1234 20
extrude 2367 34.75
extrude 2367 -34.75