Proto Screw Shield Assembled Prototype Terminal Expansion Board for Arduino (RED)

Features: 
- It provides terminal for Arduino IO, convenient port connection
- The thread can be screwed directly onto the terminal
- IO have SMT solder on the back, easy to achieve fly line connection
- Combined with the proto shield, the middle can be used as a prototype expansion board
- Prototype extending double-sided PCB via links, both sides can be welded components