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very good!!!
Arrived with two other items about 8 days earlier than the closest date, so excellent seller and transport/courier procedures. To make holes (diameter 20 mm) for bench clamps and dogs, I believe this is the most suitable solution, perhaps better than a drill guide for vertical holes that I had, but it may have suffered a bit too much from swings and vibrations. The plate with the knob ensures that the hold on the bench is firm, resulting in a proper hole in the exact dimensions of 20 mm or a few tenths more. The aluminum material is sturdy and does not have issues with bending or vibrations; the knob is large enough to fill the hand and be gripped properly. I believe it can be useful for situations involving making 20 mm holes for other projects, so the not-so-cheap price can be well utilized. Very satisfied and highly recommended.