This stone sharpens correctly. This is pt be not as well as reputable stones but are also more expensive ... so for the price it does the job !!! I was able to sharpen knives, chisels, etc ... and give them a good edge. the package was well done so no broken angle ... and I received as expected in 1 week. Small precision: The red area is a bit more porous than white and polishing is dull (not mirror) but all is well ...