A spinal cage system (100, 200, 300, 400, 500, 600, 700, 800, 900), comprising: a cage (110, 210, 810, 910), wherein the cage (110, 210, 810, 910) comprises: a body portion (112, 702); at least one opening (114, 704) through the body portion (112, 702) in a superior-inferior direction; and at least one hole (120, 122, 706, 708) in an anterior surface of the body portion (112, 702) extending into the at least one opening (114, 704), wherein the at least one hole (120, 122, 706, 708) comprises: a first section near the anterior surface of the cage (110, 210, 810, 910); and a second section adjacent to the first section and extending into the at least one opening (114, 704) in the body portion (112, 702); wherein the first section has a larger diameter than the second section and the first section and second section are threaded; and at least one locking screw assembly configured to couple to the cage (110, 210, 810, 910), wherein the at least one locking screw assembly comprises: at least one locking member sized to be received in the at least one hole (120, 122, 706, 708) of the cage (110, 210, 810, 910); and at least one fastener configured to engage the at least one locking member and to be received in the at least one hole (706, 708) of the cage (110, 210, 810, 910). a cage (110, 210, 810, 910), wherein the cage (110, 210, 810, 910) comprises: a body portion (112, 702); at least one opening (114, 704) through the body portion (112, 702) in a superior-inferior direction; and at least one hole (120, 122, 706, 708) in an anterior surface of the body portion (112, 702) extending into the at least one opening (114, 704), wherein the at least one hole (120, 122, 706, 708) comprises: a first section near the anterior surface of the cage (110, 210, 810, 910); and a second section adjacent to the first section and extending into the at least one opening (114, 704) in the body portion (112, 702); a body portion (112, 702); at least one opening (114, 704) through the body portion (112, 702) in a superior-inferior direction; and at least one hole (120, 122, 706, 708) in an anterior surface of the body portion (112, 702) extending into the at least one opening (114, 704), wherein the at least one hole (120, 122, 706, 708) comprises: a first section near the anterior surface of the cage (110, 210, 810, 910); and a second section adjacent to the first section and extending into the at least one opening (114, 704) in the body portion (112, 702); a first section near the anterior surface of the cage (110, 210, 810, 910); and a second section adjacent to the first section and extending into the at least one opening (114, 704) in the body portion (112, 702); wherein the first section has a larger diameter than the second section and the first section and second section are threaded; and at least one locking screw assembly configured to couple to the cage (110, 210, 810, 910), wherein the at least one locking screw assembly comprises: at least one locking member sized to be received in the at least one hole (120, 122, 706, 708) of the cage (110, 210, 810, 910); and at least one fastener configured to engage the at least one locking member and to be received in the at least one hole (706, 708) of the cage (110, 210, 810, 910).