I have a Curt, that has the twin jaws (like insect pinchers), and have had no problems with it. I can see an advantage to one with a single jaw that would fully enclose around the kingpin, but just haven't heard of too many incidents of the jaws popping open. And even with the single jaw design, there is still that chance it could let loose. It will be interesting to see how this one plays out.
Ed and Sharon
2010 Wildcat 28RKBS
2011 Ford F-250 XLT, 6.7L PSD
Ride-Rite Airbags and Airlift wireless remote compressor...nice!
I thought I was wrong once, but I was wrong!