Adafruit Proto-Screwshield (Wingshield) R3 Kit for Arduino

Key Features Dual-purpose prototyping shield Specifically chosen for its excellent resistance to lots of soldering and desoldering (essential for prototyping boards) Plenty of prototyping space, with power/ground rails Stack-able wing design allows you slip this under any shield Extends the Arduino pins to sturdy, secure, and dependable screw terminal blocks The next generation Proto-ScrewShield is a dual-purpose prototyping shield. Not only does it have a large 0.1" grid prototyping area but it also extends the Arduino pins to sturdy, secure, and dependable screw terminal blocks. You even get a few bonus terminals for extra GND and four 'free' terminals for whatever connections you wish! Now has stacking header for the ICSP 2x3 pins and breakout the SCL and SDA pins. It now works much better with R3 UNO's, Mega, Leonardo, as well as stacking nicely with any shield.The stack-able wing design allows you slip this under any shield and still get easy access to the "analog" & "digital"