Hey Kate!
I put them on myself so I can use the hair I like and trust in the weft. But I bought one with them already put in so I could see how it was put in and make sure they are securely put in the ones I make. I just wanted to see when I was just starting out. I put them on the bottom so you can't see them at all. Some people put them on top which doesn't make sense. Good luck.
www.theextensionist.com
Xx