Use these stacking female headers to "upgrade" your Arduino shield. Not all shields will allow stacking, either electrically or physically, but even if stacking won't work, these headers will let you make temporary wire connections to the pins on an Arduino, even with a shield plugged in.
This contains two 6-pin stacking female headers, two 8-pin stacking female headers, and one 10 pin stacking female header. This combination will work for older-style Arduinos (Duemilanovae, older Unos) as well as newer-style (Leonardo, Uno R3).
Our 10 pin headers aren't exactly the same as the 6-pin and 8-pin headers. They work great, but there's a slight cosmetic difference.