as an industrial and scientific professional, I have found this triangle thickness abrasive to be a perfect fit for my finishing needs. As a result of my tests, i determined that this abrasive was highly effective in shaping and smoothing metal surfaces. The triangular shape was perfect for accurately reaching tight corners and edges.The abrasive material is durable enough to withstand high pressure, while maintaining a consistent, fine finish. My only con is that the product could be offered in larger quantities. Overall I highly recommend this abrasive for any precision finishing needs..