Originally Posted by HillRider
This type of "external cam" qr skewers can't generate nearly the clamping force of the internal cam types made by Shimano and Campy. They work ok if you have vertical rear dropouts but can't be relied on if you have horizontal dropouts as the rear wheel is likely to shift under load.
This is not an external cam QR, it is a newly engineered type.
Here is the link to USE's site which, unfortunately, doesn't really shed a lot of light on how these things work .