Breakaway header is like the duct tape of electronics. It's great for connecting things together, soldering to perf-boards, fits into any breakout or breadboard, etc. We go through these guys real fast, and thought that given how handy they are, we'd offer them in a pack of ten!
Each pack contains 10 36-pin long headers, 0.1" pitch, that can be stacked next to each other on a 0.1" grid and broken apart easily with pliers or diagonal cutters. They're even gold plated so they won't oxidize!