http://www.ejectionsite.com/sr1seat.htmLeg restraints of the spur type are standard. To use them, the crewman dons a set of spur units on each foot, and when seated in the seat connects them to the seat by means of a ball nipple visible in the foot areas of the seat under the seat pan ledge. These restraints are connected to a set of reels at the rear of the seat (on either side) where light tension is maintained by a spring. On ejection, these reels are gas spun to retract the lines, pulling the crewman's feet back against the seat. The cables for these restraints is routed through a set of cutters which are gas actuated at seat separation.