The Partition Surface Mounted Hinge Set is for use on Right Out Swing and Left Hand In Swinging doors. The hinges raise the door up 1/4" when opening, and then gravity causes the door to shelf close. They measure 1-1/2" center to center hole spacing on the vertical and 2-7/16" center to center on the horizontal. Constructed of cast brass with chrome plating and polished. They are also known as a Bathroom Stall Gravity Hinge Set. Manufacture part # 7021.