This kit is a great tool to have when fitting a boat cover. With this kit, you can accurately line up and mark your cover fabric for socket holes before you cut them. This will help with any application that you will be using screw studs to attach fabric. If you are making boat covers and have never tried this, then you are missing out. This will make things way easier and much more efficient than how you are doing it now. Kit includes 50 sockets, 25 caps, 1 tool. Can be re-used on multiple jobs.