This is a pectoral fly and rear deltoid machine (often simply called a pec fly machine or butterfly machine).It is a piece of weight-resistance gym equipment used primarily for two different upper-body exercises:Pectoral Fly (facing away from the machine): Works your chest muscles (pecs). You sit with your back against the red pad and push the handles together in front of you.Rear Delt Fly (facing toward the machine): Works your upper back and rear shoulder muscles (rear deltoids). You sit facing the red pad and push the handles backward. Description title kubwa