STEP 2 A: Put chair back (A) on a smooth flat surface, Attached the seat (B) with 2 front legs to the chair back (A). use the bolt (F), lock washer (D), Flat washer (E) STk in both of hole of seat (B) and chair back (A); turn the Allen S wrench (1) in bolt (F). But not ' 5;5‘ A too tight. B: Use the b 0 ), lock washer (D), flat washer (E) in both of hole of seat (B) and chair back the Allen wrench (1) to tighten the Bolt (G). C: Tighten all of bolt.