Kirsch Designer Metal Curtain Rods What’s New for 2020? PDF file below contains the changes coming for 2020. Most importantly, a 1 3/8″ diameter for Designer Metal Estate assembled curtain rod. Also, a keystone cover is available for joining two rods for wide width and also can be used to eliminate the common carrier truck shipping on traverse rods over 104 inches. Additionally, a new inside mount socket hanger bracket is added.