CNC Lathe Grooving Tool Holder MGEHR1212-2(0.47 Inch), with Three MGMN200 Cemented Carbide Blades. Yellow Processed Steel, Fuchsia Processed Stainless Steel, Silver Processed Aluminum Alloy. (2mm)

For a home shop, these are just as good as the name brand tools costing three to five times as much. Just use decent quality inserts and you can’t go wrong.

The media could not be loaded. I bought this tool to put an ending notch for threading. Would work well for o-ring notches too. I tested it on some scrap stainless steel I had and it cut great. Even with too much stick out. The supplied carbide cutter worked well. At this price I might get a second as a spare because I have a habit of breaking stuff.

Obviously, you get what you pay for and this is a pretty cheap tool. It's worked well for aluminum so far, though one side of the insert for cutting aluminum broke-off almost immediately. Fortunately this didn't cause any damage to the part I was machining and I was able to finish it by just flipping around the insert.

It's not perfect, but oh my God it runs circles around the shars part off tool that was 4x as much money. I really can't believe how much better these work... the groove on the insert looks like a more stable Design vs the shars.

The MGMN200 bit is 2.0mm wide. I used it to cut a 2mm o-ring groove and it worked great.

I am a hobbyist machinist and try to keep my hobby on a budget. I bought this to part off some stainless steel tubing and it worked very well. Nice and heavy tool holder.

Looks like a really sturdy holder. I got it in a timely manner I haven’t had a chance to use it yet looking forward to using it.

Worked ok. Be sure to order more cutting points.

Perfect for my needs!