pin 150 within slots 314 will prevent rotation of body 310 collar 320 which contains external threading 322 at a distal end 320 a thereof is threaded into the internal threads 121 of end plug 120 body 310 of deployment device 300 is now captivated and restrained against further translation by collar 320 and restrained against further rotation by pin 150 when torque arm 330 is held parallel to the spinal axis which is aligned perpendicular with the longitudinal axes of the body assembly 100 and deployment device 300 the retention member 39 s tangs 220 will deploy parallel to the spinal axis to deploy the tangs 220 the torque arm 330 which is part of body 310 is held with one hand of the operator and handle 340 is rotated clockwise with the operator 39 s other hand as handle 340 is rotated the external threads on shaft 344 interact with the internal threads of body 310 at the proximal end 310 b of body 310 to cause anvil 346 to progress towards the distal end 310 a of body 310 and engage with body 210 of retention member 200 further distal movement of anvil 346 causes retention member 200 to move distally towards the.