2mm Magnetic Hex Screw Driver Bit

These look very nice, made in Germany...the the only problem is that they're not marked! 1.5mm? 2mm? you have no idea. I bought all of them because they're handy to have...but you have to keep them separated or you'll never know which is which without test fitting...which wastes time and is annoying. They stamped "Made in Germany" on each one...they could have stamped the size as well. 3 stars because of this.