Serging of trousers parts in practice is fraught with problems - far too often the cut edges are trimmed unintentionally. This results in unacceptable dimensional deviations for the garment. The ideal solution is provided by the two head serging unit class 1365. It is the best solution for achieving the highest quality standards and profitable productivity. The programmable fullness control for a uniform fullness distribution in the upper or lower fabric layer works constantly and reliably.