Apparently there are such things as Robertson, square, screwdrivers. Not too typical south of the border, so i am having a bit of trouble maybe a northern brother could help out with. I need to know the width of the smallest sized, #0 or #00, square screwdriver. They are color-coded Im told, and the sizes are orange and yellow respectively. Is it 1.5mm? 1.2mm? Maybe you have one lying in your toolbox you could measure for me?