Layer Infinity - Monster Ball

From Layer Infinity:

These are 3D printed return top counterweights. Each one weighs about 10.5g.

Version 1.1 is a revision to the original version. It can now be attached to the string in two ways:
1) Wrap the finger loop around an indented black groove (the original way)
2) Thread the string through the hole in the middle with a stopper button at the end.

And of course 3) use it as a keychain!

Monster Ball v1.1 can be used in any one of the three ways. All hardware included.

See this video here
for instructions on how to switch between the three modes.