Screwdriver

A tool used in (de)construction, electronics modification and door hacking.
You can use a screwdriver on an airlock to unscrew the panel to gain access to the control wires. Use it again to screw the panel back on.
When you use a screwdriver on electronics like a RSD, it becomes attachable. Use two attachable pieces on eachother and then use a screwdriver on them to turn them into a working assembly.