Ok, I just looked at my rep SMP and the PINS are definitely PINS and not screws. You can see a "slot" between the two halves of the pins, but its not possible to get ANY screw driver in there. The pins are actually folder over and that is what causes the tension so that they stay in place.
Maybe I am wrong, but I am SURE my SMP has pins and its one of the better SMP's reps out there.