Proto Shield V3.0 (Prototype) for Arduino Mega with Mini Breadboard

The Arduino Mega's larger header layout and extra pin count need a correspondingly larger proto shield to match, and this V3.0 version is specifically sized and pinned out for the Mega rather than being a UNO shield that happens to fit some of the pins. Like its UNO counterpart, it carries a mini breadboard mounted directly on top, letting a project take advantage of the Mega's extra I/O pins while still prototyping a custom circuit in a stable, board-mounted layout rather than running loose wires out to a separate bench breadboard.