"Scale Head" metal "Scale" shank couplers; medium centerset shank.
Replaceable centering spring
Can be used instead of a #158 coupler
Contains 20 pair of #58 Scale Metal Kadee(R) Couplers with phosphor bronze metal Centering Springs and metal knuckle springs.
It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gear box to avoid the possible electrical crossover or shorting that may cause damage