welcome!

DC high current switch, using hex bolt?screw? for reliable weld-in resistance (human power to break the connection) rather use mechanical system often break when high current surge causes weld-in or massive corrosion cause unreliable connection on common switch on same size..

could be used on high current usage device like rover, drone, robot, rccar,plane,boat etc

 

pic: main part

Bill of material:
2pcs hex bolt m3 14,5mm
1pcs hexbolt m3 6mm
2pcs terminal m4
1pcs m3 heat insert (OD 4-5mm)

pinching make reliable connection