STEP 2 2.1 Insert front, left & right side stretchers to left and right front legs. 2.2 Then align & fasten left and right front legs to cushion seat with frame using medium bolt, lock washer & flat washer. Tignten with Allen wrench. 2.3 Fasten front, left & right side stretchers to back, left & right front legs using screw. Tighten with screw driver ( not included ).