thanks nut
that blade is a lenox metalmax diamond blade....a buddy of mine turned me on to those...I was going thru metabo style blades like crazy..mostly from my grinder hitting the floor and breaking them...abrasives are dust makers, get smaller with use etc etc....
the lenox blade dia stays the same with use...its much easier to cut a straight line because theres no blade flex unlike a abrasive that will walk off in who knows what direction...they work great on sheetmetal...not so much on thicker stuff...they are slower cutting than a abrasive...ive cut a lot of metal with mine and its paid for itself several times vs the cost of abrasives..i will still use the abrasive for thicker cuts though..I got mine at lowes....he got his at Fastenal...heres a link..they had quite a selection of sizes....I went with the 5" for $19.98
https://www.lowes.com/pd/LENOX-Metal...eel/1000181275
this is what it looks like when new