3, Attach stretchers (D) to both legs. Use screws (H) tighten stretchers to both legs with Phillips head screwdriver. 4, Insert second leg assembly to seat frame (A), stretchers (D) as shown. Use bolts (E), spring washer (F) and flat washer (G) to tighten leg assembly to seat frame (A) with Allen key (1). Do not tighten bolts (E) all the way. Use screws (H) to tighten the stretchers (D) to the leg assembly with Phillips head screwdriver.