Door closer type W94-1020 CHG 1-1/8 Offset Satin S/S Concealed Mount Hydraulic Door Closer With Hook Solid S/S housing mechanism Satin finish Powerful gas-loaded hydraulic cylinder provides positive, smooth door closure Unique cover design provides for easy installation and concealed mounting Cushioned rubber roller and unique spring design offers smooth, quiet, trouble-free operation Furnished with 1-1/8 offset hook Interchangeability - unique concealed mounting hole pattern allows Snugger to easily replace all existing models in the field