Zirconium corundum is very tough and is also extremely temperature resistant. This gives it a very long service life,which in turn minimizes costs. Zirconium corundum has a self-sharpening effect owing to its micro crystalline structure. Due to this structure,during the sanding process small parts break out of the grain again and again.This results in new cutting edges which keep the grain sharp for longer.The micro crystalline wear ensures aggressive sanding and lasting sharpness,which in turn extends the entire service life of the abrasive.