There are two ways to design the halyard car.
The first is with open type bearings that can be washed out after all the dirt (at marinas) or salt gets in.
The second is with fully protected bearings and seals. Reef-Rite elected to go with the fully sealed bearings for long term maintenance free operation. Our halyard car is constructed of stainless steel with acetal (a very sturdy plastic) foil guides.