This CRL Jackson Heavy-Duty 105º No Hold Open Overhead Concealed Closer Body features dual action valves for closing operation (one valve for closing, one valve for latching). 90º and 105º Hold Open and No Hold Open models are available. Closers fit into standard 1-3/4" x 4" or larger header extrusions. Interchangeable with all Jackson and similar brands of overhead concealed closers. Mounting clips are not included with this closer body. Unless the existing mounting clips are used, you will need to purchase the appropriate clip package for your application. Contact Jackson Technical Sales Department for assistance in selecting the correct mounting clip package.