English to Italian Medical Medical: Health Care home care / bath hoist

The following film will present you an intelligent solution to this problem: the XXX. First, the supporting structure is adjusted to the size of the tub. Since the telescopic part of the supporting beam is infinitely variable, it can be adjusted to perfect fit and is then fixed with the ***allen screws***.

io ho scritto:
...lo si può adattare perfettamente a qualsiasi tipo di vasca e si fissa con delle ***viti a testa esagonale***. oppure viti senza fine??? non so proprio come si dice...
chi mi aiuta?
Grazie!!!!!!