Kason 1097 Spring Action Door Closer, 11097000004 High tension closer recommended for doors exceeding 200 lbs; Model 11097000004 Spring tension can be set to close door under a wide range of conditions Roller rod guide assures smooth operation with either rise or fixed pin hinges Invert for left-hand applications For operator safety, Model No. 1097 door closer is intended to be used where high force is necessary to close heavy doors. Mount door closer as low as possible. This is a high tension device. Improper use can lead to injury. Tension adjustment maximum wind up of 2-1/3 revolutions or 14 notches. Further winding may damage unit. Move pawl out of gear after winding. Do not use to hold door open.