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Hi Everybody! This guide takes you through the steps for installing PC cooling fan as top exhaust in your case. Suggested Supplies & Tools *Measuring Square or Ruler. *Small Flat head screw driver. *Phillips screw driver. *120mm wire fan grill for tracing (Or download printable template below) *Center Punch. *Paint Pen or Marker. *Drill press (or Hand Power Drill) *Arbor for 4.5" Hole Saw Attachment to Drill Press or Hand Power drill *4.5" Bi-Metal hole saw attachment. *Two Large C-clamps (if you're using Drill press. *Block of wood, to fit under the top panel. *Hand punch as shown here for making the screw mounting holes, or you can use a power drill. If you don't have access to a Drill press, you can use Hand Power Drill. Minimum volts for Cordless Power Drill is 18V, but 24v would be ideal for cutting into most PC cases. Download Fan Grill Hole Templates PDF File, http://www.mnpctech.3dpixelnet.com/picture_library/mnpctech.com_80_92_120_140_fan_grill_templates_rv2.pdf Before printing, you must select "None" for page scaling in your print dialogue box! We're using Lian Li PC7-plus mid tower case for this tutorial. Using Measuring Square to determine center location of the fan hole. Draw outline around the 120mm wire fan grill Now you have the exact location outlined for the Hole Saw guide bit. Unscrew and remove the top panel.