The 8130 nylon traverse rod carriers are made to fit various track designs. Commonly used in curtain tracks with cords to draw curtains open and closed. Most curtain hooks will attach through the hole. White. 14/bag. Sometimes referred to as gliders, glides, slides, and sliders. Compatible with Kirsch 3908 slides. This carrier is not compatible with any tracks currently offered on Curtain-Tracks.com and is listed for customers needing to replace missing or broken slides on an existing track system.