Deago 2PCS #10 39" Separating Large Plastic Zippers Black Tape with Double Pull Tab Slider Heavy Duty Zippers for Sewing Tents Coats Overcoats Boat Cover Canvas

#10 Separating Zipper, Automatic Lock, and Double Pull with Metal Slider. Separating Zipper --- separates at one end. Like a Coat or Jacket would, or like a side curtain on a boat that could be taken off.Automatic Lock--- it won't come unzipped where you stop zipping, middle or the end.Double Pull Metal Slider-- they are corrosion resistant and stronger than the Plastic ones that break over time. There is one Slider that you can zip from either side", 2 pulls, (handles), not 2 sliders.Application: for canvas, boat tops and other heavy duty applications.