1) Prepare 3 bolt assemblies. Put lock washer (#C) onto bolt (#A), then put flat washer (#B) onto the same bolt (#A). 2) Align the holes of the back cushion (#1) to the seat (#2), then secure with bolts (#A) by using an Allen wrench (#H). 1) Prepare 4 bolt assemblies. Put lock washer (#C) onto bolt (#A), then put flat washer (#B) onto the same bolt (#A). 2) Align the holes of the left leg (#4) to the chair, then secure with bolts (#A) by using an Allen wrench (#H).