I recently went through this journey. Keep in mind that many of the Wiha bit options listed previously seem to be out of stock at the 'well known' retailers. Specifically I kept hearing to get the Wiha 79242 torx bit set. Maybe you can get it off ebay, but again, the source can be questionable and possibly not authentic. I ended up going with the Boker Toolkit Torx head, offered on Amazon. Also, Blade HQ has several Wiha options, which I might order extra's of at some point. Hope that helps.