4-Point Adjustable Litter Bridle and Rigging Plate. This system is ready to go! Simply connect the four locking snap links to the litter. The snap links are sewn onto the straps so there is no more searching for carabiners when you need them. The other end has adjustable buckles, which are pre-attached to the rigging plate with screw links, so you can attach to the main line and go. The adjustable buckles also make it easy to change the litter angle for patient comfort. The rigging plate has plenty of attachment points for additional line, and it eliminates the normal mess of hardware caused when using an O-ring. Can be easily converted for low angle use.