Zenport Lopper Bolt & Nut MV160-410 Replacement Lopper Center Bolt and Nut for Zenport MV175, MV190. The Zenport MV175 30-inch landscape and orchard tree lopper is designed for landscaping, orchards, and shrubs. This heavy-duty bypass lopper is especially designed to meet the demands of commercial orchard work and intensive landscaping. The swivel head bolt and nylon-padded nut ensure smooth and lasting operation. Rubber bumpers absorb the shock on completion of cut.