NITOMAK 12mm Square Corners Carbide Inserts 4 Edges (12mm lengthX12mm widthX1.5mm thick-35 Degree Cutting Angle), Pack of 10, Straight-Hole

Item wasps described and arrived before time specified. Good Quality replacement Carbide Inserts. love them and recommended.

Great blades. I used these on a 3 blade slab flattening router bit. I rotated through all 4 sides of a set while flattening both sides on a 13ft black walnut slab. 1 set did the entire job, and left a really smooth surface. Def recommend them.

For the price I thought I was getting some cheap blades but they have been staying sharp far longer than I expected. Pleasantly surprised

I bought these for a surfacing bit, and the original carbide blades are so long lasting (I am pretty conservative on speeds and feeds) that I have not had to replace a carbide blade yet, though I am on my 3 rotation on the existing blades. Maybe I will have to replace a blade this year.

I bought these blade to flatten several semi-hardwood slabs 3 meters long by about 500 mm wide. I took them down from 55mm thick to 34 mm thick. Very happy with the finished result, they cut exceptionally well, and after all that cutting are still sharp. Very good.