Yeah, I was confused the first time I bought a "complete" set of these things. Thought I was getting a pair of complete sets, but what you actually get is one set of the male and female halves of the book screws. In short, I had to order another "complete" set so that I could anchor my wing to my backplate.
kresnanto k The only concern i have is the gap when fully closed. I need to mount my backplate to the single tahnk adapter but there is a layer of think pad/harness in between so i would say i will need 15mm clearance.