Attach the Leg Frame(A) to Seat(B) by using Flat Washer(E), Lock Washer(D), Bolt(C) with Allen Key(F). F— [ Take the Allen Key, and turn the bolts D— until the legs are secure. DO MOT TIGHTEN COMPLETELY. Stop when B you feel you are adding force to tighten the bolt. A Helpful Tip: Instead of applying downward pressure while reaching under to tighten bolts, have someone sit on the chair while you tighten the bolts. Stand chair up on an even surface and check that it is balanced.