This is a clamp-style guided knife sharpener that holds a blade at a fixed angle while you draw whetstones across it on a rod. The angle is adjustable from 10 to 50 degrees and locks in place, so you can match a kitchen knife, a hunting knife or scissors without freehand practice. Four whetstones come in the set, covering coarse repair through finishing. It suits people who want repeatable edges at home and would rather not learn freehand sharpening; freehand stones and simple pull-through sharpeners are cheaper and simpler but give less control over angle. Buyers rate it well overall, and the common complaints are about the clamp and the build rather than the edges it produces.
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Buyers rate it 4.4 out of 5 across 658 ratings. Most say it delivers sharp edges with little practice and like getting four stones in one set. Criticism centers on the clamp grip and the overall build.
The Iki Ruixin Pro Sharpener is an all-metal knife sharpener with a clamp-on design and an adjustable angle. It holds the knife at a fixed angle while you sharpen on a whetstone, so you don't have to keep the angle steady by hand. The set includes 4 whetstones.
The sharpening angle can be set anywhere from 10 to 50 degrees. A memory function keeps the angle fixed once it is set. You can set the angle with a smartphone or a protractor. The body is made of aluminum alloy.
To use it, clamp the sharpener to a table, insert a whetstone and fix the knife. Set the angle, then make a grinding movement. Flip the blade with the blade flipping system and repeat on the other side. The whetstones work with water, so no sharpening oil is needed. It can sharpen kitchen knives, hunting knives, woodworking knives, pocket knives, planing tools, scissors and more.
