KTC HINGE DROPS  include the tiny size series of 1355, the small size series of 3060 & 3075, the medium size series of  50-100 & 75-100 and the heavy duty size series of 25-150. The medium size drops are designed to have  multiple hole patterns, with this features,  they can be used for vertical or horizontal installations. They are also compatible to existing  fixture design data library. The small hinge units are widely used for SPC checks and also  for some other applications.   There are steel and aluminum versions for small size and medium size models.