Step 1: Place leg A over leg B Step 2: Insert upper ring (D) and secure with large Allen bolts (3), then the lower ring (C) and secure with small Allen bolts (1). Step 3: Affix the swivel plate (E) onto legs (A) and (B) using small Allen bolts (1). Step 4: Place the seat frame (F) onto swivel plate (E) and secure using small Allen bolts (1).