mi si sono sfilettati praticamente tutti, non reggono la minima tensione. e gireranno a vuoto lasciando il raggio mollo. Prodotto da evitare!

Is this a fake product? I wonder if Swiss quality DT is so poor. If any nipple is tightened, more than half will break. It's not because the spoke wrench is wrong. It is a Park Tool product, and the same phenomenon appears in several cases.

I bought 70 of these nipples to build two 32-spoke wheels, but after building the first wheel I realised that the material these nipples are made from is too soft; which resulted in small metal shavings being distributed around in the rim by the nipple driver each time the tool disengaged due to the spoke coming higher up in the nipple windings. I've had to swap all 32 nipples against stronger ones from another brand and have learned my lesson; hope this helps you avoid the same hassle as it takes out all the fun from wheelbuilding.