This item is used to hold up steel stakes in Upwards-Trained Vertical Trellising. When the plant grows, the greater weight tends to push the stake supporting it into the ground, which causes problems during mechanical harvesting. Thanks to a special housing in the disc, the stake can be inserted besides the plant.
This item, used in vineyards using vertical trellising, serves to align productive shoots with the trellis after pruning so that operating machines (cutters, sprayers and harvesters) can pass without damaging the grape. It may be used every year.