Plonksy™ Drill-Powered Mower Blade Sharpener

These are very good; better than I hoped they would be. Let me say right off the bat that you should ignore the vast majority of the 1-star reviews. Why? Because they are from people who have either no idea what they're doing, when they try to sharpen mower blades, or have no patience, which is essential. Some things just take a little time to do RIGHT, and this is one of them. I have a lawn care business, so naturally, I have to sharpen the blades from my 4 different mowers frequently. That adds up to 10 blades to sharpen, which takes some time, and is generally a pain. I've always used a bench grinder, followed by files and sharpening stones, to achieve a good, sharp edge. But if you use a bench grinder, you know that it's hard to free-hand any mower blade across a grinder wheel and get a consistent edge, because without some kind of fixed guidance system, it's hard to maintain exact pressure along the length of the blade's cutting section. So you often end up with a wavy pattern, lost metal, and inconsistent edge. Those factors don't lend to extended blade life. But these sharpening wheels solve that scenario. Used correctly, they keep a consistent angle and pressure on the cutting area of any blade. If you look at the picture I've included, you can see that the edge has a bit of a wave to it, rather than a straight cutting surface, but that is from using the grinding wheel, in the past. The pic is not of new blades, but used ones, which I re-sharpened with this product. But notice the beautiful, consistent angle to the freshly-sharpened blade! That's the beauty of these sharpening wheels; the angle is pre-set. You put it in your drill, fix the blade to be sharpened in a vise, and start running the wheel back and forth along the edge. In pretty short order, you have a professionally sharpened blade that's ready to be put back into service. My only suggestion is to Not use a battery-operated drill for this procedure. Use a drill that plugs into an electrical outlet, because the process takes a little while to complete, and unless you have only 1 blade to sharpen, the drill's speed will slow down, and you won't get the results you're after. Also, I read one review that said he used an air tool. Well, he's not the only one who has air tools, but the speed of an air tool runs down as the compressor's output runs down (until it kicks back on), just like battery-operated tools slow down. I very much recommend this product! If you have a modicum of patience, skill, and reasonable expectations, you will get the results you seek. Don't listen to the nay-sayers. These things work, WAY better than a bench grinder and with a lot less time and work!

These replacement blades were exactly what I needed to get my lawn mower back in good shape. They were easy to install and fit properly. After putting them on, the mower was cutting much better and leaving a cleaner-looking lawn. Great option if you need replacement blades without spending a lot.

Worked extremely well. The factory lawnmower blade is wave shaped which made sharpening very challenging. In addition the metal in the blade isn't the best quality. So the fact that these sharpeners worked as well as they did is fantastic. The included metal blade balance is a welcome inclusion.