very poor quality product, the grooves of some cutting edges are located very eccentrically with respect to the axis of the tool (semi-finished product for production), so they are practically non-existent (marked places), these tools are unusable
The quality of the reamers is poor. One Tooth on 6 mm reamer has broken on first use in aluminum. Some of the reamers have wrong size (either too small or too big by few 0.01 mm). Sharpness is unequal. I would not recommend this product.