This is not as strong plastic as the ones you buy at your local grocery store. They detach from the crosshead when you try to install them. They work if you pre-drill a hole to put them in, but that's not what you bought them for. Do not buy.
Pros
Easy assembly: no pre-drilling required. The anchor has a sharp, pointed handle that can be screwed directly into the wall with a screwdriver or screwdriver, making it easy to use and less dusty.