A 25 Torx bit is 25 What???

The number before the Torx is equivalent to the fraction of a mm that is the length of the male member of the person used to set the diameter . Basically you take that 25 mm and divide it by 1000, this gives you the length of the ***** used to set the measurement. Still bigger than @ScampMike :icon_fU::icon_fU::icon_fU::icon_fU::icon_fU::icon_fU::icon_fU::rofl: