Many men strive to develop their pectoral muscles for a look of bulk and projection. Some men are unable to develop the pectoral muscles that they hope to achieve and opt to enlarge the appearance of their chest muscles (pectoralis muscles, "pec" muscles, or simply "pecs") by placing solid silicone implants. Pectoral implants (chest implants) are for men who are looking to achieve shapelier chest muscles. Silicone implants are inserted through incisions in the armpits to create more muscular and defined pectoral muscles.