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The coffee leveler does exactly as described. Can't imagine a more costly one being any more effective. Levels the freshly ground coffee in the portafilter making the layer very even, barely requiring a tamper afterwards. Coffee extraction much more even and consistent using this tool. Worth every cent.
Does the job way better than expected: it renders my professional tamper for exclusive use with coffee that needs additional compaction. Was worried this was a little ill-fitting, but didn’t create any noticeable issues.
I slightly settle the coffee before use, then spin clockwise until a smooth surface is achieved without friction from the coffee.
Word of warning: as per another review, this is tightly screwed together on upon delivery. I cut my hand on the distributor portion trying to loosen the middle locknut. Eventually, I put some coins into the top grips bolt hole to create a gap between the top grip and the locknut, so I could twist the locknut away from the distributor portion. This technique can also be used to “fix” varying heights.