Sharpening on the other hand is reupholstering the furniture or telling the hair stylist to give you a new look. Material is going to be removed from the edge of the blade. There’s no way around it. How much is removed will be a function of just how dull the knife has become or whether you’re sharpening to compensate for a chip in the edge or because the tip has broken off. If your knife is not damaged and you have it sharpened twice a year very little material will be removed each time, yet it may still be enough for you to notice just by looking carefully with the naked eye.
As opposed to water whetstones that require you to pre-soak the stone, the Norton oil stone is pre-filled with oil to save time and eliminate the need to pre-soak it prior to use and the lubricant stays on the surface during sharpening.  The oil also prevents metal from bonding with the abrasive surface by flushing away dislodged abrasive and metal chips.
From the look of it, one can easily tell that it is designed to deliver the user comfort when using it, safety and great results. The knife sharpener is made of quality ABS material that does not rust. The base is flattened, and it is non-slip in nature. The user enjoys two stage sharpening system from this product. This makes it easy to operate and also sharpen the knives. You can use it for steel straight blade kitchen knives.

Ye olde tomato test - After you have sharpened using one of the above sharpeners grab a firm tomato and try to slice it. If the blade is properly sharpened it will slice through the skin with virtually no effort and without pushing the skin inward first. If the skin is able to fight back against the blade then your knives are not properly sharpened yet.
High Grit Stones: These are also known as finishing stones with the number range going up to 8000, and give you a super refined edge.  They work great with Western knives as they cutting edge resembles a “U” as opposed to a “V”. If you are using your knife to cut meat, then you can happily stop at 4000 or 6000 grit. If you are only using it for vegetables or fruit go all the way to the 8000.
After 15 hours of research and testing, and several adult lifetimes of kitchen experience, we recommend the manual Chef’sChoice ProntoPro 4643 as the best mechanical knife sharpener. It’s impressively simple—almost intuitive—to use: You run the blade back and forth between its diamond-impregnated sharpening wheels to cut and then hone a new edge. The ProntoPro 4643 works on both traditional European and Japanese knives, which use different edge angles, making it universally utilitarian. (Note that we also link to otherwise equivalent but cheaper single-angle sharpeners below.)
The Fallkniven DC3 Diamond/Ceramic Whetstone Sharpener will make a believer out of anyone willing to invest a bit of time in the process. A big advantage of this stone is that it can be taken anywhere, used anywhere, without any form of lubrication and will produce an amazing sharp edge on whatever needs sharpening. Timeless Old World tech that still dazzles.
A honing rod is the best and easiest way to maintain a knife’s edge between sharpenings, and among the nine models we tested (five steel, four ceramic), the Idahone stood out for its exceptionally smooth surface, which was gentler on the blades than the other rods. It rapidly realigned and polished the edges of both German knives (made of softer metal) and Japanese knives (made of harder metal). It also removed less material than the other ceramic competitors—a good thing, because it means knives will wear out more slowly. And it didn’t chip hard Japanese blades, the way steel honing rods did. The maple wood handle is the most comfortable and attractive one of the honing rods we looked at, and it comes with a sturdy ring for hanging. The Idahone is 100 percent US-made, too.

Just to prove that we're not merely sharpening geeks, here's an interesting side note. The word whet pops up in some unexpected places. A small species of owl is called the saw-whet owl because the sound it makes reminded people of the sound made when sharpening a saw with a file. And the phrase "to whet your appetite" comes from the idea of your hunger growing sharper at the thought of food.
A single stone of 120 grit and a combination stone of 1000 and 3000 grits come along with a stone holder all for a price of less than many other individual stones. The stones are 6 7/8" long and 2 1/8" wide. A flattening stone of some kind would be needed, but with economical options available in those, the overall price of this kit would still be low. This entry level set is a good budget minded option.
The double sided 400 and 1000-grit Water Stone Sharpening Block by Whetstone enables you to safely and easily sharpen and polish your kitchen cutlery, hunting or pocket knives, blades and razors. You can even use it for your gardening tools! This stone only requires water, no oil needed! Made with durable green silicon carbide, this honing tool will last for years to come.
Although it is slightly expensive than other tool sharpeners, this one saves you quite some precious time. It is one of the fastest ways to get all your blades sharpened. In addition, you just need to spend a few hours with it, and you will learn its entire operational procedure. Avoid excessive sharpening, since it might leave scratches on the blade’s surface.
Jigs, such as the industry-standard Edge Pro, are an extension of the stone method, as they use simple but cleverly designed armatures to maintain a consistent angle between the stone and the blade. They’re extremely effective—professional knife sharpeners are some of their biggest champions—but they’re also expensive, and really practical only with a dedicated workbench.
People often describe the Trizor XV as putting a 15-degree edge on a blade, but the reality is a bit more complex. It in fact produces what Chef’sChoice calls a Gothic Arch Edge, which consists of three distinct bevels, the final one at 15 degrees. Not surprisingly, the company claims that this “blade architecture” is more durable than a single bevel. More convincingly, the testers at Cook’s Illustrated and America’s Test Kitchen use the Trizor XV on all their knives and actually convert 20-degree knives to the Gothic Arch Edge. (Europe’s medieval cathedrals, too, attest to the strength and durability of the Gothic-arch form.)
The word “Novaculite” is derived from the Latin word “novacula”, which means “razor stone” and is essentially a metamorphic, recrystallized, variety of Chert composed mostly of microcrystalline quartz that is found in the found in the Ouachita Mountains of Arkansas and Oklahoma and in the Marathon Uplift of  Deposited in the Devonian Period and the early Mississippian Subperiod some 410 to 325 million years ago and subjected to uplift and folding during the Ouachita orogeny of the Atokan Epoch (early Pennsylvanian Subperiod), Novaculite is a very tough stone that is resistant to erosion and thus, the various layers of Novaculite stand out as ridges in the Ouachita Mountains. Thus, due to both its availability and its composition, it has been mined since ancient times for use as arrowheads and spear heads as well as in more modern times for use as sharpening stones. 

Modern synthetic stones are generally of equal quality to natural stones, and are often considered superior in sharpening performance due to consistency of particle size and control over the properties of the stones. For example, the proportional content of abrasive particles as opposed to base or "binder" materials can be controlled to make the stone cut faster or slower, as desired.[7] Natural stones are often prized for their natural beauty as stones and their rarity, adding value as collectors' items. Furthermore, each natural stone is different, and there are rare natural stones that contain abrasive particles in grit sizes finer than are currently available in artificial stones.[citation needed]
Some experts recommend sharpening as if trying to slice a thin layer or decal off the stone. Don't consider doing this without significant experience: it is typically bad advice; most people don't hold the correct angle this way. You instinctively raise the blade until you feel and see the edge working. This creates larger edge angles and thicker bevels as time goes on and the results gradually deteriorate. The more you sharpen, the duller it gets. Sound familiar?
Our second entry from Chef’s Choice is the 463 Pronto Santoku. This manual sharpener is super-simple to use and delivers fast, high quality results every time. While this is a “2-stage” system there’s nothing complicated about it. One slot is for sharpening and the other for honing. Both stages utilize diamond abrasive surfaces so your blades will retain its edge for a good long time.
Oil stones have been around a long time, and while not as popular as in the past, they are still a practical option. Not as fast as the other stones, they are easy to use and their lower price makes them a good value for the budget conscious. With oil stones, the relation of the types and grits can be confusing. Our article, Difference in Sharpening Stone Materials, provides a more in depth explanation, but in general an India stone or two combined with an Arkansas stone is a good combination to start with.
Place an old coffee mug upside down so that the bottom of the mug is exposed to the air. In a pinch, a coffee mug can serve as a surprisingly effective sharpening tool if you don't have any fancy equipment. The ceramic material of a mug is a material coarse enough to get good results. Indeed, some honing rods even use ceramic material to keep a blade homed in between sharpenings.

Using the strength of industrial high precision superior mono-crystalline diamonds, Diamond Machining Technology (DMT) have created a durable longer-lasting flat sharpening surface that will efficiently sharpen, hone, deburr and polish almost any type of knife or cutting tool. The DMT set contains 3 one-sided whetstones that have extra-fine, fine, and coarse grits which means you have a complete sharpening system at your fingertips.