Get a precision fit with these lovely machined 'Swiss pin' headers. In this world nothing can be said to be certain, except we need headers, headers, and more headers!
Each pack contains five 36-pin male plug headers, standard 0.1" pitch. You cannot use regular stamped-metal headers with swiss pin as they will not fit
Female headers are like the duct tape of electronics. They're great for connecting things, soldering to perf-boards, sockets for wires or break-away header, etc. We go through them real fast and thought that given how handy they are, we'd offer them in a pack of five!
You can cut these down to different sizes fairly easily. First, count how many positions you want as the final piece, then cut the next pin's plastic in the middle (there's one pin that gets sacrificed). You can clean off the half-spot with a file or diagonal cutters.