PLEASE NOTEBefore purchasing, you need to measure the size of the original car lock tab. The width of the lock tab is 2.1-2.2 cm, and the length of the lock tab is 2.1-2.2 cm.lock is greater than 3 cm. You can use this extender, otherwise it will not workEasy to install and removeThis seat belt extender is easy to install, just put it into the seat buckle and connect the seat belt buckle to lock, just press thered button to remove it, and the operation is simple.MaterialThe automobile extension line is made of high-quality polyester and high-quality steel, it can provide better cushioning in braking or emergency situations, and can protect your family from injury.Safety and practicalityAdjusting the tension of the car seat belt will protect you, your shoulders and your family's clothes from the friction and stimulation of the seat belt, providing a more comfortable driving experience.safe to the car owner.AdjustablePerfect for use with fat people, pregnant women, firefighters and service men with bulky equipment belts, those with limited mobility and range of motion.