I have let myself tempted by the good recessions to buy this expensive set, because I strongly in the (allegedly) contained triangle Bitkopf needed a device to open with just such screws. Unfortunately, this bit contrary to the product description (and even contrary to the accompanying Bitkopf Index) is not included. When I recently used the set in a different context, the bit used is already in the second screw (which I have already no longer so get out) was defeklt. It is cheap chinaware. Therefore, I would strongly advise against the purchase - it's not even worth the scarce 4 Euro unfortunately ...