You'll want a U-channel crimper. I'm several thousand miles away from mine right now, so I don't remember the exact brand/model, but it cost me about C$23 (US$15 or so). I just asked the techies at the electronic components shop to find it for me.
There are several "sizes" of "crimps"; I'm using the "smallest" size on the docking pins and it works great -- solder not required. I couldn't even come close to that good of a crimp with pliers, even though I've been doing it "the hard way" off and on for the past 20 years or so.
Cheers