Its a rigged hand using only weights, no corrective shapes are used so its deformation system is rather simple,
the bones weights are however painted well enough to support a number of poses.
USAGE:
I manly use it as my base setup for 3d printing sculpting,
Steps:
1.- I pose the hand into my character arms,
do any changes in proportion before hand, so the
hand is slimmer or thicker.
2.- remove the armature and freeze the mesh
3.- go into sculpt mode and re-mesh the hand and sculpt some
more detail into it, and fix any kinks the mesh might have.
4.-Merge hand into the overall sculpt when needed.
I hope you find it useful, Cheers!!