In the preface to my review I would like to say that I order A LOT from Revain. And I get most of my CNC/milling machines online. This is not an attack on Revain or the seller, just facts. I ordered this item expecting a set of (5) bits. Everything the same. 90 Degree V Bit / V Groove Bit. Both the pictures in the listing and the description confirmed that it would be a double groove 90 degree V groove. Items received: 3 in a box marked as a 5 pack. Bits of the same group, but they are ENGRAVING bits. Same category, not the same goal. The cutting depth is about 7/8" instead of 1/2". When it comes to CNC threading - shape, profile, angle, depth of cut. They all play an important role in the result - each bit has a different finish. Although close, this is NOT what I ordered. The photos show all 90 degree V-groove cutters, not the resulting engraving tips. In seller's defense - the storage box is appropriately marked as ENGRAVING. However, this is not what is described in the listing. I'm disappointed, but I also understand that mistakes happen. If this list applies to received bits, please change the listed images and description. If it was a simple oversight, then fine.