When I was still a child my dad used to work abroad he works there as an engineer. I used to ask my mom when my dad will come home she always tell me soon. But it took 10 years before I got to spend time with my dad. While he was gone I missed him a lot because I didn’t had the attention and love a father could give. Every now and then my dad would send us a package specially on special occasions like Christmas, my birthday, or my mom’s  birthday and  every time we received a package I always noticed that there were this colored locks attached to the package. When I asked my mother about it she told me its for safety purposes and it is called trailer seals. they are used in packages to avoid it from getting tampered and to avoid theft. And also to ensure privacy my mom told me that its very useful.