An inserter instrument for inserting an implantable system, the implantable system comprising: - an expandable device comprising a first endplate, a second endplate, a body positioned between the first endplate and the second endplate and a drive screw and a lock positioned within the body, wherein rotation of the drive screw is configured to increase or decrease a distance between the first endplate and the second endplate, and the lock is configured to stop rotation to the drive screw, - the drive screw having a head portion and a shaft, - the head portion having a plurality of protrusions defining a plurality of notches therebetween, an annular ring, and a circumferential groove between the plurality of protrusions and the annular ring, - the lock having a first ring and a second ring connected to the first ring by a strut, - wherein in a locked position, the second ring rests in the circumferential groove of the head portion, the strut is located in one of the notches, and the first ring of the lock rests on a top face of the head portion; the inserter instrument comprising: - an inserter sleeve including an inserter body with a guide shaft extending from a proximal end to a distal end, and a handle at the proximal end, the guide shaft including a tubular member defining a channel therethrough, a first plurality of splines defined within the channel at the proximal end; - a threaded shaft positionable through the channel of the inserter sleeve, wherein the threaded shaft includes a cannulated connector shaft, a slider including a second plurality of splines configured to engage with the first plurality of splines; and - a driver 116) positionable through the threaded shaft, wherein the driver includes a shaft with a linear cam configured to engage the slider of the threaded shaft, wherein when the driver is positioned through the threaded shaft and the linear cam engages the slider, the slider linearly translates towards the distal end, thereby causing the first and second plurality of splines to mate, and thereby locking the implantable system to the inserter instrument - an expandable device comprising a first endplate, a second endplate, a body positioned between the first endplate and the second endplate and a drive screw and a lock positioned within the body, wherein rotation of the drive screw is configured to increase or decrease a distance between the first endplate and the second endplate, and the lock is configured to stop rotation to the drive screw, - the drive screw having a head portion and a shaft, - the head portion having a plurality of protrusions defining a plurality of notches therebetween, an annular ring, and a circumferential groove between the plurality of protrusions and the annular ring, - the lock having a first ring and a second ring connected to the first ring by a strut, - wherein in a locked position, the second ring rests in the circumferential groove of the head portion, the strut is located in one of the notches, and the first ring of the lock rests on a top face of the head portion; - an inserter sleeve including an inserter body with a guide shaft extending from a proximal end to a distal end, and a handle at the proximal end, the guide shaft including a tubular member defining a channel therethrough, a first plurality of splines defined within the channel at the proximal end; - a threaded shaft positionable through the channel of the inserter sleeve, wherein the threaded shaft includes a cannulated connector shaft, a slider including a second plurality of splines configured to engage with the first plurality of splines; and - a driver 116) positionable through the threaded shaft, wherein the driver includes a shaft with a linear cam configured to engage the slider of the threaded shaft, wherein when the driver is positioned through the threaded shaft and the linear cam engages the slider, the slider linearly translates towards the distal end, thereby causing the first and second plurality of splines to mate, and thereby locking the implantable system to the inserter instrument