Whenever I visit the hardware store I always scrutinize all the types of devices used when you tweak things. They have their own sizes and they differ in shapes. One time I end up in the section of trailer seals and I was shocked to see different types of seals for trailers. Frankly speaking they all look alike for me, but since I was there I scrutinized them to learn more from it. I found out that they differ in strength and they differ with the materials to use. Some was created with metal and had a cable which they named as cable seal. I was pretty sure it was created with heavy-duty, steel aircraft cable. They even have high security seals that are used to lock up high value cargo up tight for absolute protection from tampering or theft. And there are much more types of trailer seals that I have discovered that day.