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Tri-glide buckles, also known as tri-glide slides or Plastic 3-Bar Slides, are a type of sliding buckle strap adjuster. They allow for fast and convenient adjustments to the length of straps and have an impressive range of applications, including belts, bag straps, pet collars, tie-downs, utility straps, and more! Plastic hardware is both lighter in weight than metal hardware, and resistant to water or moisture, so there is no need to worry about rust or corrosion. Because of this, plastic hardware is often preferred for outdoor use. Durable, lightweight, and versatile, our 1 inch black Plastic 3-Bar Slides make a great addition to any strap.