The Gripper is a Pneunet design that is based on the Fast Pneunet architecture. It is designed by Ben Finio. It has 2 variations - Gripper and Mini Gripper.

The fabrication process is described in detail on the Instructables page.

The molds are available for download on Thingiverse. Additionally, a base bold that supposedly has more gripping power was published on Thingiverse by XYZAidan.

• Top layer: ~35g
• Base Layer: ~5g

• Dragon Skin 30: ~35min
• Ecoflex 30: ~15min

From the toolkit website:

Using a thin metal rod, pierce the end of the actuator, an equal distance from both sides
and about 1/8” (3mm) from the bottom.  Aim the rod slightly downwards and don’t push it in too far.
The goal is to reach the central channel without puncturing any of the actuator’s walls.