Torx screwdrivers are the right size and spare screws are good to have in case one of the 5 outer ones gets lost, but I don't understand why there aren't T7 screws included for the inner ones. These are the smaller ones that you are most likely to lose. The plastic tool is extremely thin and the tip broke after removing a handle. I've used my fair share of non-scratching tools and this is the cheapest on the market.