Via my friend Scott Mize: Advanced Materials reports on a  reversible mechanical interlocker inspired from the wing locking device of beetles.
The interlocker is highly flexible and displays an extremely high shear locking force of ∼40 N/cm2 as well as an easy normal lift-off.
The image shows an illustration for the wing-locking device of beetles that is operated by interconnecting densely-populated microhairs (termed microtrichia) on the cuticular surface. Â Continued… (subscription required)…