Ideal for building abseil points - the Hanger Fixe 3 Bi-Chrome Plated Steel by Fixe! The Bolts trailer has two integrated rings and consists of zinc steel. By using two rings they can each turn freely and the abrasion by the rope pressure will be reduced. Due to this, the rings can be used for a very long time, even if the Bolts trailer is being used very often. Furthermore, the rings always stick out of the rock, so the rope will not get caught behind the ring when it is let out.