Review on 📏 Highly Efficient Slide Rule by Robert Tyus

"Super Cool" ; not even begin to describe the information packed into this card. The most useful tool I've come across in a long time. No specialist, no matter how long he has been in the trade, should do without this practical tool. I've been in the trade for over 20 years and I don't know how I lived without one for so long. Just got it a few days ago and it's already paying off in the time saved. And don't forget the app, lots of useful information and videos.