White plastic four wheel carriers with metal loop and magnetic catch. These are compatible with the Standard Duty or Medium Duty 6100 Flexible Curtain Track. These are used similar to master carriers at the leading edge of a pair of curtains. When the Magnetic Catches come together when the curtains are drawn together (closed), the magnet on on catch attaches to the metal plate on the other. This keeps the curtain together when closed. The curtains can be easily separated by hand when opened. Effective in improving privacy and/or light blocking capability for curtain panels that meet on the curtain track. These only fit the 6100-S Standard Duty or Medium Duty Flexible Track - Not available for Heavy Duty Flexible Curtain Tracks. The drop (distance the loop hangs down from the curtain track) on these carriers is 1/4 in lower than the drop of the 6111 carriers, which should be considered during curtain fabrication. Adjustment is easy with drapery pin hooks, but may be a minor issue with curtains panels with grommets. Sold in pairs (2 per pack).