SENDUO 3PCS 1/2" CNC Lathe Carbide Turning Tools,Shank Indexable Turning Block Holder Bit Set,Metal Indexable Carbide Turning Inserts with Tin Coated Carbide Inserts DCMT21.5

Tools are well machined, the mounting surfaces that the inserts ride on are flat enough, If you need a tool like this, this set will work! slightly smaller than 1/2" (0.470in/12mm). the inserts provided had no issues cutting mild steel or weld on mild steel with er70s2. Hardness on tool shank between 50 and 55 HRC.

I would give a 5+ rating on this set, but the boring bar that I received is not the same as advertised. I received an S12M-SCLCR06 rather than a S12M-SCLCR09, but this is not a deal breaker. The only reason I'm mentioning it at all is because the S12MSCLCR06 uses a carbide insert CCMT060204 which I don't normally use. I usually use CCMT09T304 and DCMT070204 and of these I have plenty on hand. So now I'm going to have to get some CCMT060204 for change out. And yes, it would be a pain to pull a boring bar from another machine to use on the machine that this set is being used on.As for the whole set, it is of high quality! All of the tool holders are well made and are very precise. The inserts seat flush with no room for play. Time will tell as to how the holders will hold up though. I haven't broken any inserts yet and see if the holder breaks right along with it. Will it break and become useless?For the price I paid, I almost feel bad. I feel like I stole this set! I Highly Recommend!

The cutters look good, but the little box of extra inserts is missing from my order!

These are nice tools. The inserts aren't the best, but I don't buy for the inserts. They are disposable. I buy for the holders, and these are well machined, precise. and durable. Great addition to the shop.