RowndUp Gate Latches – Feature self-latching, one-handed operation with universal mounting and universal strike bar. When gate swings closed, the striker bar hits the ring which then rolls up and drops back around to securely shut gate. Lock securely with or without your padlock. Made of reinforced 10-gauge steel with black powder-coated finish and durable zinc chromated rings. Fit most gates; work on wood, round tube, galvanized metal, chain link, ornamental, wrought iron. Great for farm and ranch gates, barn doors, corrals, dog kennels, garden gates and residential gates.