AnW American Ninja Warrior 50 ft Zipline with Spring Brake - Kids Zip line Kit - Great Zipline Kit for Kids and Teens - Recommended Ages 8+

Is the actual length 50' or 60'? in the description it says 50' for a course length of 40' and in one of the pictures it says actual length is 60'

how long is the main cable ?

Do you need a specific kind of tree for this? Does it wrap around a tree or does it nail into it?

How much extra cable line is included to account for going around the circumstance of the trees? I’m specifically looking at the at the 50ft Zipline.