Step 1. Insert cross rails (part C} and shelf rails (part D) into frames (parts A & B) using sunk bolts (part #1) and Allen wrench (part #2). Note: Please fully tighten all bolts at this time. x12 Step 2. Drill two 11/32" holes in the wall where this unit will be secured. Tap wall anchors (part #3) into the drilled holes. Attach unit to wall anchors (part #3) using screws (part #4) and Philips head screwdriver and tighten to secure.