The diamonds are of the highest quality yet so fine, the smaller hole saws are made from the pressing of one steel tube. The larger hole saws are made from three pieces the shank, cup and body. They’re then welded together using a laser. Not by conventional heat induction, as heat induction can cause tiny cracks during the brazing process.
The rim is then pressed, passing through to be electro-plated; then follows the last procedure which is nickel plating.