Called Retroshift, the mounts come installed on their own brake levers, (a Tektro model brought back to life for this project), and you provide your own levers, (must be Shimano or friction shifters. No mounts for SRAM or Campy at the moment), which you mount to the levers.
Gravel Grinder News will be reporting on these since I feel the shifters may be an advantage in gritty, wetter rides, and will save the expensive STI levers for the cleaner road riding, which they were intended for.
Stay tuned as I begin to ride these. For now, you can read about the installation and first impressions on Retroshift lever/mounts here.