The power care, which I have, is great and I would highly recommend it. If the others appear identical I would still choose power care.
There is a chart provided with the package that shows the depth depending on the type/size of chain tooth.
The guide has 25, 30 and 35 degree angle markings.
The kit contains all three round files for every chainsaw.
instructions are pretty much useless in my opinion. if I cant figure it out on my own, i am probably going to return this product. no thought put into developing the instructions for a novice.