If you're wondering why your Spyder won't shoot full auto or modes, this little item is most likely missing from your stock Spyder electronic board. It either worked its way off the board, the jumper gnomes took it or you bought your marker from a place such as Wally World and never had a jumper on your marker's board in the first place. Simply pop one of these babies in place and the capability of full auto and modes are magically restored. They come in packs of 3 just in case those measly little jumper gnomes strike again!