It's the lightweight version of Manufakturs adapter. The adapter is suitable for 650g, 1kg and 1.1kg cardboard reels. One half weighs only 27g. A screw and two adapter halves (a set) weigh a total of only 87g The handling of the screw is also improved. The thumb nestles better.
It can be used for Spoolroller, AMS and HydraAMS.