Kason 1094 SureClose Hydraulic Door Close Powerful gas-loaded hydraulic cylinder guarantees controlled closure Exposed mounting model with adjustable wide hook in flush to 3/4 inch offset; Model Numbers 11094000003 and 11094000026 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