The Screw Shield extends all pins of the board for Arduino out to 3.5mm pitch screw terminals. It also has a lot of the utilities provided by Arduino Protoshield, including a large prototyping space of both connected and unconnected 0.1" spaced through-holes, a couple of 5V and GND busses, a reset button, and a 5mm green LED.

The Screw terminal can be screwed directly to the terminal on the thread and is reliable and convenient. It can be plugged into the Arduino-compatible controller. You can use this shield to save yourself from the bad port connection. Feel secure with this Arduino-compatible screw shield.

In the case that you have a breadboard, the shield does not ship with a breadboard. The best suitable breadboard is Basic Bread Board With Slot - 16.5*5.5 cm.