Ratty is correct. Many times They either will work, or can be made to work. Pins too long often can work fine, and leave just a bit of juice in the well.... Really, there is 2 main diameter/ size styles of pin that you will see over and over, with a few different ones thrown in here and there. For the price, buy them! Even if you only get 1 out of 4, you're squonking, baby!