Antique Ladder Lock Slider Buckles are designed to hold under tension and release by lifting the front tab. They allow you to adjust the length and tension of your straps. This buckle is a single sided ladder buckle, meaning it is easily adjustable from one end. This makes one-handed adjustment easy, whether releasing or tightening. This type of hardware is idea for backpack straps, fanny packs, hip packs, and other bags that require an adjustable strap. Our metal ladder buckles are extremely durable, verse the more common plastic ladder buckles.