Apparently there's blue and green Bosch tools and one is the pro line, as I only recently learned. Not sure if Würth is still around for tools, but we had Hilt

Apparently there's blue and green Bosch tools and one is the pro line, as I only recently learned. Not sure if Würth is still around for tools, but we had Hilti and Würth for the most part. But I also inherited an old Oerlikon drill that is probably older than I am...