Each cord has a snap-hook on one end and a door jamb nub and a loop anchor on the other end. To use, attach snap-hook on one end of bungee cord to D-ring handles, D-ring straps or D-ring anchors. On the other end of the bungee cord, choose from the following options: grip the loop, use the loop as a foot stirrup, or place nub anchor in a door jamb. Use to perform upper or lower body exercises.