If you have loads of HG Gundam model kits, this is one accessories you should get.
Releasing in 14th of July 2016, HG Build Custom is releasing JiGen Build Knuckles.
These parts are just for HG gundam and offer many cool looking pose as now the hands are no long open and close but different fingers pose option.
All these hands are accessories that is compaitable to HG model kit. You can do pose such as below.
These box is only selling at 500 Yen and you can color it on your own on any HG gunpla.