I don't know that I like the names of the ratings. These little gems I prefer buying on-line because I for $5 I get 10 of them. At the dollar store they are $1.25 each. I am a cashier who talks a lot about things especially when I find something that I really like. These little gems plug into your phone/tablet. For me why I use them is I have big fingers with long nails. So typing is a chore ok not the typing the correcting. They come in various colors. Some even have a pen. They have a soft tip on one end so its so rubbery like so no damage to your screen and your screen isn't full of fingerprints Fingerprints annoy me.
As I love to do little nice things for people. I buy multiples of these and when the store is out or I really like the customer I give them one.