Push the pistons to train your fingers. Enjoy the carry-anywhere design.

Finally, your life won't be complete until you print this finger trainer!

Printing

• Print it without supports and as oriented in the STL. (The openingshould point down towards the print bed.)
• The pistons are fully print-in-place: No assembly required, just remove the from the print bed and push away!
• The spring (inside) is 3D printed, and works well also if you print in PLA.

Models included

There are 4-piston, 3-, 2- and 1-piston (for the thumb) versions included.