This CRAFTMEMORE 1 Inch Metal Ladder Lock Tri-Glide Tension Lock Slide Buckle is perfect for adjustable backpacks and straps. Made of zinc alloy metal with rust-preventive coating, it is high strength and resistant to corrosion. It fits well with 1" (25 mm) webbing/strap and has an overall measurement of 1-1/2"x1-3/8"(38 x 30mm). Available in 4 pieces of one color, it is great for webbing, fasteners strap, nylon webbing, camping bag belt, handbag bag, purse, suitcase, backpack, sports equipment, pet collars, and DIY projects. Get the perfect hold for your backpack with this CRAFTMEMORE 1 Inch Metal Ladder Lock Tri-Glide Tension Lock Slide Buckle. It is strong, durable, and rust-resistant, making it the perfect addition to any backpack. Get yours today and enjoy a safe and secure hold.