fig . 1 depicts a full view of the picnic table backrest . it shows the backrest , the bars that wrap around the bench to keep the back rest stable and the latch on the back of the rest that keeps the rest from slipping out . fig . 2 shows a close up view of the latch on the rear of the backrest . the bar that holds the latch swivels upward to latch on to the top part of the backrest . this keeps the backrest from slipping out and also holds it in place so it doesn &# 39 ; t shift while your sitting .