Due to design, the bi-directional or switch plow produces far more drag than a conventional moldboard plow. Our Poly Last moldboards and covers have a super low coefficient of friction that dramatically reduces drag. Less resistance improves soil flow and turn over. It also reduces the stress on your equipment, improving fuel economy and reducing maintenance costs. These results are most noticeable in heavy or sticky ground but almost everyone can benefit from the addition of Poly Last moldboards and covers.