Straight Female Headers

They work well, but keep in mind that you will loose some pins when you cut them

these break away headers are perfect for attaching an arduino to your proto board. nice solid connections that almost feel permanent.

As expected

Nice solid connections. It was only a little difficult to break off the segments

They are described as 'breakable' and I thought break into 2 x 20pin, but further reading of small print on Robot Shop web site says you might lose a few pins in process of snipping with wire cutters.