The invention relates to a fastener break-off of plastic material for the training of vegetation high cultured in a line, such that the vine. The body (10) of this clip comprises two semi - circular grooves (11, 12) having a common opening (13) delimited by two flexible tongues (14, 15) directed towards the inside of the clip. These grooves (11, 12) are separated by recesses (16, 17, 18), making the clip break-off. Main application viticulture.
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