spindle body 56 to overcome the bias forces generated by the spindle body 56 on the cap member 34 to disengage the tabs 98 from the ramped projected recesses 60 removal by pulling the cap member 34 away from the mounting plate 40 requires substantial force to be applied this enhanced locking interaction substantially improves the overall durability and reliability of the pull cord keeper 30 with reference to fig1 to 8 the installation and operation procedures of the pull cord keeper will now be described a suitable point on the wall 18 proximate the upper portion of the window treatment assembly 2 is selected the mounting plate 40 is fastened to the point on the wall 18 by the fastening screws 44 with the spindle body 56 extending away from the wall 18 the spool 50 is placed into the cap member 34 with the open end of the axial bore 70 oriented up the pull cord 4 of the window treatment assembly 2 is then drawn all the way out i e raising the bottom rail 12 to the top of the window 5 the end of the pull cord 4 is pulled through the opening 36 of the cap member 34 the free end of the pull cord 4 of the window treatment assembly is knotted and placed into the axial bore 70 the pull cord 4 is slipped into the spool slot 72 the coil spring 46.