Since the waterjet stream is a round tool, with a diameter between 0.030" and 0.040" (0.76 mm and 1.02 mm) for abrasive waterjet cutting, creating any inside corner that is perfectly square is impossible. CAM software will typically read geometries and give a user the option to automatically place a very small radius on these corners. This will avoid damaging the part and reduce processing time, as radii are faster to cut than square corners. For very acute angles, the actual part that is cut may differ significantly from the original drawing and should be considered for form, fit and function before processing.