As an example, they’ve built one. This one, called “MK2 Lockpick” is a wrist-mounted array of linear actuators, with a lengthy design/build log to peek into.

Micro linear actuators bring compact motion control to robotics, medical tools, and precision automation. Learn where they’re used, how to install them, and why engineers rely on these small but ...

Unless someone has done the work for you, of course. That’s what [Ali] from PotentPrintables did with these 3D-printed linear actuators.

Minimal dimensions, high strength, low weight Compact and flexible: Linear actuators with toothed belt drive from norelem The precise linear actuators from norelem represent a standard solution ...

For tasks requiring sub-micrometer precision — such as alignment, adjustment, or fine positioning — PI’s M-235, L-220, and M-230 series linear actuators deliver reliable, high-performance ...