It's best to use a socket designed specifically for removing the injectors. You run the risk of bending/damaging the return nipples on the injector if you use a standard deep socket. The sockets specifically designed for removing the injectors have more space up inside so as not to hit the nipples.
I have a "Kobalt" 27mm deep socket 12-pt that works well for me (clears the nipples) that I got from Lowes. part number is - 22312