The low pulley flye targets the middle and upper portion of the pec muscle. It is an excellent alternative to standard cable flyes or lying dumbbell flyes especially for those with shoulder issues because it will not over-stretch the joint. By keeping the hands and arms in this position it also incorporates more bicep and front deltoid into the motion. While tricep strength is key to a good press, many people fail to realize that the bicep actually plays a large role in stability of the joint (the bicep, front delt and pec all insert in the same place on the long bone of the arm). Adding exercises like this to the end of a chest or shoulder routine would help a lot of people. Also, try super-setting this one with similar exercises like standing plate raises.