Indexable Lathe Turning Tool 21Pcs Kit 3/8'' 10mm Shank 7Pcs Metal Lathe Tools Holder Set with 14Pcs Turning Inserts for Turning Grooving Threading Boring Carbide Inserts Carbide Turning Tool

These lathe turning and boring bar tools are well made and a great value. The cutting inserts have multiple cutting edges and fit perfectly in their respective tool holder. The included insert locking wrenches also have a molded thumb-and-finger tab enabling ease of changing the tool holder inserts. A well made addition to small lathe fabrication needs.

I was looking for more durable cutting tools and these work well.

My only complaint is that there aren’t any right side cutting bit holders in the set.

This product was all I expected it to be. Made very well; durable. Fulfilled my need. Seller was prompt in delivery.

I have spent hours hand grinding high speed steel to make boring bars the old fashion way. All ready made bars with replaceable cutting edges is well worth it. Replacing the sharp inserts is faster than removing the high speed steel boring bar to sharpen or regrind then try to continue the cut and maintain the dimension.

I decided to post a review of these before I used them, because of so many reviews claiming they didn't get the quantities of bits advertised. I did. I bought the 12mm (1/2") holder set, and got 7 holders (6 types, 1 duplicate, which makes some sense in this application), 14 bits, 8 Torx keys. The cut-off bit holder is different from the others, with a flex-pinch capture of the tool, rather than a screw capture, and apparently the company that makes this set thought that the small plastic-handle Torx key wouldn't provide enough torque to clamp the cut-off bit in the holder. So they also provided a much bigger, standard 90-degree configuration Torx key. I think this is a good idea, because leaving a carbide bit loose enough to chatter is a sure way to break it quickly. Quality of all pieces, and the individual holder containers, and the box they come in (which is cardboard, rather than plastic) looks quite good.No, I haven't used the tools yet, so I can't testify as to their operational qualities. But I doubt that my experience will satisfy many people in any case, as I work almost exclusively with brass, which shouldn't challenge ANY half-way reasonable bits or holders. A real test would probably require using the lathe on a decently hard stainless, or high strength steel with an interrupted cut situation.Even working mostly on brass or aluminum (and absolutely if you are working steel or stainless), my fervent advice to all is, if your lathe's tool holder has the capacity to accept 12mm (1/2") bit holders (like the present set), spend the few extra $ to buy that size, rather than the 10mm (3/8") bit holders. Every possible means for you to reduce tool flexure/chatter reduces the chance of breaking carbide bits, and increases the chance of producing a smooth finish on the work-piece. Wear your safety goggles!

Exactas a la descripción y la foto, de buena calidad.

The part that's good is the holders are accurately machined for a good fit and the inserts are very sharp. I can get a good surface finish even with .001" finishing cuts.But there are some flaws with this set that really diminish its usefulness. There are no left hand bits, so no way to turn the rim of a disc, or face toward the centerline. The external threading tool is biased so you can thread to a shoulder, but it is so much easier and safer to thread in reverse away from the chuck with the tool upside down, and for that you need a bit biased the other way.The boring bar has only .75" of relief so you can not bore any deeper without either grinding relief along the bar or angling it in the toolpost to provide the relief, which substantially increases the minimum bore size. The internal threading tool had the same issue, but of course you can't angle it because the insert is square to the axis of the bar. This insert is very small: the maximum thread pitch is about 14 TPI (1.75mm) and the minimum diameter the bar will fit inside is about 5/8" (16mm) so there is absolutely no standard nut you can thread with this tool. The external threading tool is a bit bigger and could go to 8 TPI (3mm), which is still not great.All in all, I'm disappointed in the set and expect I'll only use a couple of the tools to any extent, so what seemed like a low price is certainly not, at least for my use cases.