This prototyping shield works with UNO, NG, Diecimila and Duemilanove Arduinos. You can use it with a Leonardo but it will not break out the hardware SPI pins (they're only on the ISP connector underneath) or the IOREF/SDA/SCL pins. However, the SDA/SCL pins on the Leonardo are also on digital #2 and #3 so you can still use them by connecting to #2 and #3.

Check out these awesome specifications:

• Power rails near the edge, leaving good prototyping space at the center
• A reset button
• 2 3mm LEDs, 1 to indicate power and 1 connected to pin 13 (L led), red and yellow, as well as 2 matching resistors