Free linkedin email finder

I use an email finder for LinkedIn as well, I use Aeroleads, it has been my primary email finder for quite some time now and I'm pretty satisfied with the quality of leads I'm generating. It is not free but it costs very less and I do not have much of an issue with spending so less amount if I have the surety that the information I'm getting is verified. I have used many such email finders in the past and I've observed that either the tools do not provide quality information or they cost a lot for giving quality information, this tool costs a lot less than the other alternatives and has a verification system that ensures good quality of information.