Hi, I've been looking for this tri-wing screwdriver too. I tried Radio Shack and the hardware store to no avail. The bit they sold me at the hardware store was a #1, way to large for the macbook pro. However, I've discovered that the required tri-wing is the same as used for Nintendo products, shown here: eBay posting However, you might not want to trust what you see on eBay. I also found this: http://www.powerbookmedic.com/Tri-wing-Screwdriver-p-17352.html Here is the google search string I used: apple triwing|"tri-wing"|"tri wing" Hope that helps, Shelah
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