Ideally suited for most types of doors that are 1-3/4" thick, the #218IC is made of zinc and steel materials. Nylon links provide added strength and durability. The SOSS Invisible Closer gives you a door closer that is totally invisible from either side when the door is closed. The closure rate is completely adjustable with an allen wrench after installation, and does not require removal of the closer. Installation can be either inside the door itself or inside the door jamb. Opens a full 180° and is a single action hinge.

UL rated: can be used on hollow metal, sheet metal, tin clad, steel composite or wood core swinging type fire doors and frames with a 20 minute rating.