【Double-Sided Adjustable, No Sewing Required】Regular 50mm plastic buckles require sewing on one side, but with these 50mm side release plastic buckles, you don't need to sew, as both the male and female sides have two slots to thread the strap through, so you can adjust the strap on both sides of these 50mm plastic buckles. 【Easy to Replace】Easy to replace broken buckles on backpacks, waist belts, belts, dog collars, fanny packs, baby carriers, etc. Our plastic buckles are easy to install, they simply attach to the straps without the need for sewing. Hand Wash Closure: Buckle Modern 【Quite Heavy Duty】Made of high-quality plastic with good flexibility and durability, these 50mm plastic buckles can withstand 3000 pull tests, they can withstand 70 kg of pulling force, they are heavy-duty 50mm plastic buckles. 【50mm Strap Buckles】These 50mm plastic buckles are used on 50mm wide straps, so these plastic buckles are also called 50mm strap buckles. 2 sets included. 【Easy to Use】These 50mm strap buckles are easy to use, easy to release with one hand, and no accidental release. These 50mm plastic buckles are quite easy to fasten and unfasten. These plastic buckles never twist when tightened or loosened.