Originally Posted by
FBinNY
Actually this is sort of a hybrid seatpost. It uses the same clamp hardware as clamp-on saddle brackets, but not the center section which is integrated into the post. If the OP buys a decent saddle bracket and chucks the center section, he can make this work. It won't be perfect because the serrations wont match, but it will work decently enough if he doesn't change the saddle position often.
OK, maybe it will work but it seems it will clamp only the outside of the saddle rails. Perhaps that's enough. I still think a replacement post is worth the slight extra cost.