insert geometry, I bought three and they all look the same

Three CCMT inserts, three little codes, all described as general purpose. One cuts mild fine on the Atlas. One rubs. One chips. The catalog pictures are identical. If the code is the whole difference, I'd like someone to say which half of the code I should have read.

The last letters are the chipbreaker and the grade. You bought a stainless grade, a steel grade, and something for cast iron, and you asked them to be the same tool. Read the page, not the photo.