Gikfun Prototype Shield DIY KIT For Arduino UNO R3 Mega 328P (Pack of 3 Sets) Ek1038x3 Proto Prototype Shield It's Diy Kit Prototype Shield Diy Kits for Arduino UNO R3 Mega 1280 2560 328P 3 sets ProtoShield Gold Print Board The Prototyping Shield makes it easy for you to design custom circuits. You can solder parts to the prototyping area to create your project, or use it with a small solderless breadboard (not included) to quickly test circuit ideas without having to solder. It&#039;s got extra connections for all of the Arduino I/O pins, and it&#039;s got space to mount through-hole and surface mount integrated circuits. It&#039;s a convenient way to make your custom circuit and Arduino into a single module.