A quick learner from Maryland says:
October 11, 2010
I would like to replace my spiral sash. 5/8th and 17 inches QTY 2. Do I need the tensioner tool to install them or do the come ready? Thanks
Mike from SWISCO responded:
October 12, 2010
It is recommended that you have a charging tool on hand so you can adjust your balance to the appropriate setting for your windows.