I've seen these things demonstrated and they're quite impressive.
I had one contact incident with a table saw blade. I was trying to do a plunge cut and the piece got away from me. I simultaneously heard a sort of "Ting!" and felt something grab my finger...it was about 10-15 seconds before I got up enough nerve to see how much of my finger was left. Fortunately, it just took a plug out but talking about scared!
I had one contact incident with a table saw blade. I was trying to do a plunge cut and the piece got away from me. I simultaneously heard a sort of "Ting!" and felt something grab my finger...it was about 10-15 seconds before I got up enough nerve to see how much of my finger was left. Fortunately, it just took a plug out but talking about scared!