The most advanced coating technology that utilizes stone grouping and uniform grit layout with Laser Precision enable MAXCUT's eminent performance with far superior cutting power and paper life while maintaining a uniform finish. The MAXCUT products have specially hardened Aluminium oxide grains, which score a 9.8 on Mohs scale of mineral hardness. Compared to the hardest mineral, which is industrially produced diamonds which a score of 10, this is nearly the hardest existing mineral and thus perfectly suited for extremely hard sanding jobs.