Tension tool

thingiverse

Tension Tool for Lockpicking Newbies: Get a Clear View of Your Efforts! To build this handy tension tool, start by grabbing two springs and inserting them between the top and bottom parts. Then, secure the top part with two screws. For optimal results, make sure to smooth out the surface (use sandpaper if needed) before printing your tension tool in high-quality mode. This will prevent any pesky spring-surface interactions that might ruin the printed parts.