Originally Posted by
Trsnrtr
Yup, those'd be posts. Unfortunately, it limits you to post-mount calipers (if you have a flat-mount frame, you can use either flat-mount calipers or adapted post-mounts) and Shimano seems to have chosen flat-mount as their default caliper style (all of the current hydro groups are flat).
You can still go Shimano by buying levers and calipers separately, but the pricing might not be as attractive.