Proto Screw Shield-Assembled (Arduino Compatible)It combines the power of screw shield and prototyping shield. This Proto Screw shield offers a better way to do prototyping. 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 controller. You can use this shield to save yourself from the bad port connection. Feel secure with this Arduino-compatible screw shield.The prototyping shield provides a fast prototyping area for projects. It features a LED (D13) and two buttons (reset and general).