Bora 501057 Fine/Coarse Combination Sharpening Stone, Aluminum Oxide Gray, 6"

Very good,i will buy it again.

Works very well. Sharpens blades nicely.

Like a number of other people have stated, the quality control on this stone is not always the greatest. Mine arrived intact without any serious flaws. It has pretty smooth corners, but it did have a few small elevations/lips along the edges. I used some 280 grit sandpaper on a flat surface and knocked them down, only took a minute or two. I soaked it in water for a few minutes and used a little mineral oil every now and again. I was taught that a water soaked stone will suspend the oil on top, some people say using oil with a natural or aluminum oxide stone like this should be considered a permanent decision to always use oil. Since I didn't soak it in honing oil, I think it'll be fine to just use water from now on. At these grits I didn't think oil was particularly useful, water was just fine. I learned how to sharpen edges from a Norwegian woodcarver on fine blades and chisels, using a method I have never seen in any YouTube video on sharpening using a stone (I push the blade spine side first, and use a wavy motion). After rotating through both sides of the stone, I stropped my knife on a leather belt. It is now much sharper. My point is there are many ways to sharpen your tools and if you're new, just work on becoming proficient with your method and keeping a consistent angle when you grind. Plenty of resources to help you learn if you're new to using a sharpening stone. The coarser dark side is 150 grit, and the finer light side is 240 grit. I wouldn't use this stone on my nicer kitchen knives, but it's serviceable for my beater pocket knives and would work well on other tools that are harder use like axes or pruning shears and such. The only time I would use this on a fine kitchen knife is if I somehow allowed it to get really dull. I'm going to invest in another stone with finer grits, but I imagine this one will last as long as I don't lose it. Even though it needed a little work on my end to make it ready to go, for the price I'm not bothered. It's a cheap stone which would work well for your heavy duty tools and be serviceable for other finer applications, but I'd really consider looking into finer grits if you want to really put a keen edge on your kitchen knives. This will work for more people, if you're really into putting a razor edge on your blades you're already looking at other products.

Excellent value … I used it to sharpen everything from kitchen knives to scissors to garden shears.

I recently got a job at a State Park. One of the first things they asked me to do was to cut down some vines. I was appalled when I went to the tool shed and saw how dull all of the tools were. A workman is only as good as his, (or her) tools. I asked how I could sharpen them and was directed to a bench grinder. For garden snips? Since I dont want to GIVE the state my money but wanted sharp tools I was looking for some inexpensive sharpener. This stone is GREAT. Whenever I find I have some free time with nothing to do I grab half a dozen tools from the shed, sit on a bench under a tree and get busy. My boss thinks I am a hard worker who takes pride in her job, I think I am sitting on my fanny under a tree in a park enjoying the weather, and I know the next time I have some bushwhacking to do this stone has made all these tools, from the hand axe to the loppers to the hedge clippers to the garden shears, razor sharp.

Will not remove anything heavy

This stone is the only stone other than diamond that can sharpen my benchmade. I’ve literally chewed through several cheaper diamond plates and Arkansas stones won’t even touch the blade. I use my knife everyday to do things like open paint cans and cut wires. It stays sharp fir a long time considering what I put it through. I usually send it to the factory to have them resharpen because it has a lifetime warranty. I just don’t like to wait two weeks for the return. This rock solved my problem. Don’t waist your money on those 1000 or 3000 grit stones if you have a benchmade like mine. ( believe me, I’ve tried them all)…This silicon stone is all you need.

This wet stone is recommended to be used with oil, but I'm using water so I may not be getting the full effects of it. Regardless it's still a great product. It's allowed me to grind down and reshape blades, and even different steel items, on the rougher side and the smoother one has allowed me to sharpen the blades pretty well, but not to the point where you can shave with it as it's nowhere near fine enough. The grit will give you a nice hone that would be more than enough for everyday needs.

I'm using this as a water stone, so not sure if that's causing this, but the stone is wearing quickly.

Las tuve que devolver al no ser del material requerido; pero las califico con cinco estrellas, porque es de buena calidad; pero OJO NO ES de CARBURO DE SILICIO como se indica en el anuncio (que sirve para afilar inclusive, los aceros más endurecidos; como son: al alto carbono, aleados con cromo-vanadio, con cobalto, con carburo de tungsteno -fresas de router-, etc). Es de ÓXIDO DE ALUMINIO (ordinario y no corindón duro o endurecido); que en piedras de afilar no funciona con ese tipo de aceros. Por lo que es una piedra básica más bien doméstica (y no profesional), que sirve para cuchillería de aceros negros o inoxidables de dureza estandard y herramientas de regular o baja calidad. En cuanto a la relación utilidad-calidad-precio; resulta adecuada. Con las anteriores salvedades; sí es recomendable, ya que Norton es una marca de prestigio. Tengo piedras Norton como ésta con muchos años de uso que con cualquier aceite "aflojatodo", o con petróleo diáfano funcionan de maravilla. También funcionan al agua, con ayuda de "lechada" despendida con la talla de alguna piedra suave de mortero o similar (no pómez porque es muy suave y no sirve), logrando un afilado muy rápido y placentero. Pero definitivamente no compite con las piedras orientales japonesas o chinas; ya sean naturales o cerámicas de corindón y carborundum (carburo de silicio, carburo de boro, rubí, zafiro, zirconia, etc) que son de alta gama y afilan en general, todo tipo de aceros. Al margen de mi devolución; el pedido llegó antes de lo esperado y en perfectas condiciones de embalaje. Con las anteriores salvedades sí la recomiendo para principiantes o como piedra de afilado doméstico.

There's a lot of gimmicks and extra options out there for knife sharpening. This is all you need with a cloth or rubber padding to lock in the stone. Water or oil to lubricate and a bit of dexterous motion to sharpen pretty much any blade or scissors.

خشن جدا والغالبية ما حيحتاجوه ، لا تآخذه إلا اذا سكينك حدها مرة معدوم وممسوح والشفرة غير متساوية وشكل النصل زي موج البحر ، لإعادة تشكيل الحد فقط

Had one rough edge but it rubbed off no problem. These are very flat and uniform. I used it to clean up my 123 blocks. Worked great. The stone is quite porous so it drinks WD40 and they stays well lubed during use. Easy to clean.