(Source: Colligo Marine)
These lightweight aluminum blocks can be used for low movement applications like split backstays, running backs, setting up your own purchase system for an adjustable Backstay or Boomvang. Great for Inhaulers too! They are designed with a large radius and can be used with Dynex Dux. They have no moving parts and take advantage of the low friction of UHMWPE lines like SK-75, SK-78 or Dynex Dux.