Flat Sash Rods from Kirsch are typically used with extremely light weight sheers or fabrics and mount almost flush with the wall. While Cafe Rods from Kirsch are also meant for very light weight fabrics, their decorative design allows for mounting in a more traditional fashion.
Spring Pressure rods are most frequently used when mounting with brackets in the traditional fashion just isn't possible. It's very important to remember that spring pressure rods are not meant to hold very heavy draperies. And, only those rods labeled as Shower Rods should be used in wet areas.
Kirsch has several other rod options available in this collection like Door Rods, and rings for various rods.