Cut the wire shelves and support poles to the size needed for your pantry with bolt cutters. Cut down on the metal and bend the metal back and forth until the metal pops loose. Cut each piece until it is the right size for your pantry.
Arrange the support poles against the wall. You need at least two support poles for each wire shelf. The support poles are long metal pieces with holes evenly spaced along the metal. Place one metal pole flat against the wall and drill a ¼-inch through the screw holes in the metal and into the wall. Drill a hole through each screw hole in each support pole.
Attach the support poles to the wall with 1-inch wood screws. Sink a wood screw through each screw hole in the pole and into the hole you made in the wall in the last step. Repeat this step until each metal piece sits firmly on the wall.
Place a metal support brace on the support pole. Line up the curved edges of the brace with the holes in the pole. Push the edges into the holes and push down until the brace slides into place. Repeat this step, attaching each brace to the poles.
Set the wire shelves on the support brackets. Slide an end bracket onto a shelf that touches the wall. The bracket slips over the ends of the shelf. Press the bracket flush against the wall and screw two 1-inch wood screws through the bracket and into the wall. Attach an end bracket to any ends that touch a wall.