2024 New Upgraded Version Ruixin Pro RX009 Aluminium Alloy Knife Sharpener System 360 Degree Flip Constant Angle Grinding Tools

This kit is 5 stars since it is an economical way to create a razor sharp blade, but I have the following reservations: 1. You must work slowly and with a VERY light downward pressure. It does take patience. 2. The manual is mostly well written and it has useful advice. It has a procedure for setting the proper angle to use for sharpening. However, it recommends a small digital angle gauge (not included) for accuracy. 3. It comes with everything shown, but NOT the “free gift”. 4. There are 4 regular abrasive “wet” stones (120%23, 320%23, 600%23, 1500%23) that MUST be soaked in water before use. As long as they are kept wet they should last a long time, but they break if dropped. They can produce a razor sharp knife, but the 3000%23 and 5000%23 stones are of questionable usefulness. I believe that the 1500%23 stone is actually a coarser grit. 5. The kit also has 240%23, 400%23, 600%23 and 1000%23 diamond abrasive “stones” which I find work faster. They can be used dry as long as they are washed off frequently. I used the 240%23 diamond stone to fix the damaged tip of a pocket knife, but an even coarser grit would have been useful. 6. The nice storage box does NOT fit all the stones. 7. This kit and ALL other brands of sharpening kits have an Achilles heel in that there is no good way to firmly hold a small pocket knife while sharpening. The black rubber fingers on the aluminum knife holder only work with large kitchen knives. Sharpening a small knife requires their removal and then it is tricky to firmly hold the knife. Try putting masking tape on the blade to help get a grip. 8. The stones are not well labeled. Plan on adding your own. 9. The included Allen wrench (hex) is not of high quality.