* Commercial & residential use, multi-size door closer, adjustable spring power.

* Universal model offering versatility mounting applications: regular, top jamb and parallel.

* Standard adjustable back-check, optional delay action function.

* Precision heavy duty rack(piston) & pinion gear.

* Factory tested to meet or exceed ANSI standard 156. 4

* adjustable power size from 1 to 4, and 3--6.