A small tracked excavator with pneumatic booms, a detachable counterweight and multiple attachments.
It is far from perfect, but it does work to an extent, the main issues come from the way stormworks models their pistons.
The included attachments are a PTO module that can be used to provide RPS in hard to reach places with a torque connector, pallet fork, bucket, personnel basket and a large drill head (which is why the counterweight is included).
All attachments come with a release button located near the connection point, they will connect automatically when aligned adequately.