I have only given 3 stars to the rolls I received due to the following: The thickness of the paper is about 15% less than the Platte River rolls that I had previously received. The weight of the roll is 30% less. The analysis was run on the 180 grit. I noticed that they felt remarkably thinner and lighter than the Platte River rolls. So, I used a micrometer to measure the thickness and a postal scale to measure the weight of the Platte River rolls versus the new rolls. Since the thickness is only 15% less but the weight is 30% less it appears that there must be much less abrasive material. I will wait and see how these rolls hold up under work conditions. Then, I will update my review.