I have used many Forstner bits over the past 10 years, mainly from a set I bought from Big Box. I ordered 2 Big Beats from AMZ. They are all standard (inches) and none of them were fish bats. I needed a Forstner metric and this fish nozzle was the only one I could find. It cost a little more than I was willing to pay but worked way better than any standard bits I have. I am seriously considering buying a complete set of Fisch Forstner bits. Longevity unknown but I suspect it will be good.