Kason 1094 SureClose Hydraulic Door Closer with 7/8 to 1-5/8 Inch Offset Hook, Exposed Mounting, 11094000003 & 11094000027 Powerful gas-loaded hydraulic cylinder guarantees controlled closure Exposed mounting model with adjustable wide hook in 7/8 to 1-5/8 inch offset Solid steel enclosed housing and bend-resistant hook assure long wear in heavy use Extra-wide hook ensures roller pick-up and overcomes alignment problems; mounting slots on hook allow for easy adjustment to compensate for door sag, keeping roller aligned with hook for proper function Life-cycle tested to operate reliably even after a half-million closures