- 1). Instruct a helper to press the bookshelf flush against the wall. Make sure the gap, if any, between the shelf and the wall measures less than 1/4 inch.
- 2). Drill 4 holes through the back of the bookshelf and into the wall using the drill and the 3/8-inch drill bit. For the most stability, position 2 in each corner, 2 inches apart and 1/2 inch to 1 inch from the shelf's top. Drill each hole with one firm, careful motion.
- 3). Insert one expanding drywall bolt into each hole. Once the bolt is within the wall, the butterfly clasp will open.
- 4). Pull on the head of the butterfly bolt while at the same time hand-tightening it clockwise. You must accomplish both movements simultaneously. If you don't pull on the butterfly bolt while your tighten it, the clasp within the wall will not tighten.
- 5). Tighten each butterfly bolt with the Phillips screwdriver once the head becomes flush with the bookshelf. Do not overtighten, or the head of the bolt might sink into the back of the bookshelf.
- 6). Tug lightly on the bookshelf. If it pulls away from the wall at all, tighten the butterfly bolts more.
- 7). Cover the butterfly bolt heads with wood-colored tape. This disguises them, providing a "solid wood" appearance.
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