I've been looking at buying a set of Torx screwdrivers for taking small things apart, the sort of screw that's 2mm across. But there seem to be two notations out there:
T4, T5, T6, etc and T0.5, T0.6, T1.0 etc (often they're quoted as T0.5x40, where I'm guessing
40 is the shaft length), such as these:Thanks Theo