Dual-side Adjustable and No Sewing The strap is adjustable on both sides of the 20mm plastic side release buckles. Unlike regular quick side release buckles, these do not require stitching on one side. No sewing is needed with these 20mm quick side release plastic buckles as both the male and female sides of the plastic buckle feature two slots for feeding the strap through. Simple to Use These 32mm plastic side release buckles are very easy to use and allow for straightforward replacement of broken buckles on belts, pet collars, etc. Just remove the broken buckles and insert the strap into our 20mm plastic buckle clips on both sides. No sewing is required. Hand Wash Fastening: plastic buckle Strong The plastic buckles are crafted from high-grade plastic. After undergoing 3000 tensile tests, these 20mm plastic buckles can withstand a pulling force of 25kgs (55lbs) while holding tension effectively. Colour: Black Size: 20mm Quantity delivered: 4 pieces