I purchased this bur to use for woodwork (hollowing operations) using an electric die grinder. It runs and cuts well, but it is made of steel ... presumably HSS. On the one hand, I wanted carbide (especyally for $30+) and am somewhat disappointed. On the other hand I subject it to lightish duty and can get by with HSS. But how soon will the lifetime difference rear its head? Carbide is more durable, even in wood.These things are rather useful and indispensable when you have a lot to deburr or can't get a hand file in where you need it. The carbide seems to have been polished smooth - the quality is that good. The TiN coating will certainly help retain the edge at least twice as long and aid in better finishes. All around a tiny but great tool. Made in USA.BonjourPas vraiment content, La fraise Champion SL3NF que vous m'avez envoyer et pas le bon modèle, le bon modèle doit avec un revêtement au titane nitrite !!!! de couleur Doré .Celle que vous avez envoyer et un modèle de base sans traitement de surface !!!CordialementLaurent CharlesStill using this many years later!!Heaviest duty burrs I have found for grinding welds seem to hold up the longest AAA+++