These plastic ladder lock buckles from Fastex are great for use with backpack straps. Made from acetal plastic, they’re a rust-resistant alternative to metal fasteners. Fit for many other fastening functions, Ladderloc buckles feature a classic, ergonomic design. Simply affix the buckle to your chosen webbing strap for easy strap adjustment. Choose from three styles below. Or shop metal webbing hardware in our hardware section. For more information on how to choose the best fastener for the job, see our Fastener Guide.