Sure, The mechanism works by moving the wrist up and down, so if your friends have wrist motion then the device will work.
Here are 2 links to the hardware:
2 bags of these...
Type: Posts; User: Dlevy
Sure, The mechanism works by moving the wrist up and down, so if your friends have wrist motion then the device will work.
Here are 2 links to the hardware:
2 bags of these...