How to Check the Amount of Deep Backlinks?

[VinceWicks]

I'm thinking about checking the amount of deep backlinks on my site because I have a hunch that I don't have enough of them. Now, the problem is that I have no idea what tool (on-line or offline) I need to use. I did some Google research but it did not give me any results.

[Bio-RadAbs]

SEOMoz's Opensiteexplorer? You can look at the external link domains, it even breaks it down to show you the page on the external site with a link to you

[VinceWicks]

Thanks but how do I get the amount of deep backlinks (specifically deep ones) that I have to my site?