Ryan goes into a bit more detail over on the Strongergrip Blog, but in short : you’ll want these. Beautifully simple idea.
These will be available in a couple of days. In the meantime, the pre-order page briefly explains what they are :
It is a handle that conveniently allows a resistance band to attach and a 1-1/8″ diameter handle to pull. The handle also is perfect size for FatGripz and other thick grip sleeves.
StrongerGrip BandGrips. Beautiful.