Best Flex Hones of 2026

"As a motorsport engineer, the FLEX-HONE is essential for peak engine performance and flawless reassembly. I always rely on this tool for its precision and efficiency, ensuring seamless results every time."

"I was amazed by how smooth and polished the surfaces turned out after using the FLEX-HONE. It's remarkably versatile and effective on mild steel, stainless steel, and cast iron. I highly recommend it to anyone seeking professional-quality finishes with minimal effort."

"I used this to deglaze my engine block cylinders and it left a perfect crosshatch pattern without removing too much material. Very forgiving and simple to use—I’d recommend it to anyone working on a rebuild at home."

"As a motorsport engineer, I rely on the FLEX-HONE for precise and efficient engine work. It’s an essential step in my reassembly process, ensuring smooth and flawless results every time. I wouldn’t skip it for anything."

"I recently used the 4-1/8'' 240-grit FLEX-HONE and was impressed by its versatility and performance. It delivered a highly polished finish on mild steel and cast iron. This tool made the job easy and efficient, and I’d recommend it to anyone seeking professional results."

"I was considering a trip to the machine shop, but after using the FLEX-HONE with the recommended oil, my N55B30 engine cylinders turned out spotless and rust-free with a perfect crosshatch pattern. Truly a great product for engine work at home."

"I used this tool to clean out the lifter bores on my small block Chevy, and it worked great for removing buildup. It made my rebuild process much smoother and efficient."

"I had to hone both cylinders on my Briggs VTwin lawn tractor engine, and after watching some manufacturer videos and consulting the seller, I decided to spend a bit more on this hone. In less than 10 minutes, I got a perfect cross-hatch pattern on both cylinders, following the instructions. Definitely worth the extra cost for the result and reliability."

"After struggling for years with metal brushes and files to clear out tilt tubes on outboard engines, I tried this hone. With a bit of oil and a drill, it made quick work of corrosion in the tilt tube. Even though it only lasts for a couple of tubes, it's far cheaper and easier than replacing the whole tube."

"As a motorsport engineer, I always rely on the FLEX-HONE to boost engine performance. I make it a point to use it before reassembling engines, especially when a full honing isn't possible. Its precision and efficiency consistently deliver flawless results, making my reassembly process smooth and effective."

"I’m thoroughly impressed with the Brush Research GB41824 FLEX-HONE’s performance. After using the 4-1/8" diameter, 240 grit tool, I saw smooth, polished finishes on mild steel, stainless, and cast iron. Its versatility makes it an essential tool in my workshop, and I recommend it to anyone seeking professional-grade results with minimal effort."

"I was considering a trip to the machine shop, but the FLEX-HONE and matching oil completely restored my N55B30 engine cylinders. The rust is gone, and the cross-hatch finish is just beautiful. It’s a fantastic product for home rebuild projects."

"I decided to do some preventative maintenance on my snowmobile engines and needed to prep the cylinders for new pistons and rings. After some research, I went with these 320 grit aluminum oxide ball hones for my Nickasil cylinders. They were perfect for de-glazing and refreshing the crosshatch, making the break-in process smooth. Once I got the hang of holding the cylinder steady, the process was surprisingly easy. I found the hone was much better than the old stone hones, and won’t damage the ports if you make a mistake. I’d definitely recommend these for anyone doing a top-end rebuild at home."

"I used this flex hone to rehab the cylinder on my dad's Echo CS-400 chainsaw after a piston seizure. It did an excellent job cleaning up the rust and cross-hatching the cylinder, so the new piston ring seated perfectly. The chainsaw is back to running like new with great compression. The only minor downside is the price, but it’s still worth it for the quality results."

"These hones are incredibly useful for all sorts of projects—I’ve used them to clean 3D printed steel parts, expand tool holder ports, and clean steel valve ports. There’s really nothing else quite like them on the market. The only issue is that I always forget what they’re called when I need to buy another one."

"I used this tool while rebuilding my log splitter engine for the first time and was really impressed. The hone quickly removed cylinder glaze and helped me avoid having to buy oversized rings. The results were just what I needed."

"After struggling with other tools to clean out tilt tubes on my outboard, I gave this a try. It made removing corrosion fast and easy, saving me a ton of time and effort. I just wish it lasted a bit longer, but it’s still way better than replacing the tube."

"I picked the Flex hone over cheaper honing stones for my 22hp Briggs V-Twin rebuild. Following the video instructions, I got a flawless cross-hatched finish on both cylinders in under 10 minutes. It was worth every penny for the results and peace of mind."

"I used this hone to prep my Briggs VTwin lawn tractor engine, and I was really impressed. Following the manufacturer’s instructions got me a flawless cross-hatch in both cylinders in under 10 minutes. It was absolutely worth spending a little extra for the Flex hone instead of settling for cheap stones. Fantastic results and great value!"

"After years of struggling with metal brushes and files, I tried this tool for my outboard engine’s tilt tube. With a little WD40 and a drill, it made quick work of the corrosion. While it doesn’t last forever, it’s still much easier and cheaper than replacing the whole tube."

"I was rebuilding my log splitter engine for the first time and used this tool after spotting grooves in the cylinder. With a bit of patience and the right oil, it cleaned up the cylinder beautifully, just enough for a good seal without needing oversized rings. Worked like a charm!"

"I used the Brush Research GBD40024 FLEX-HONE (4”) on my Chevy 350 engine cylinders and was thoroughly impressed with both the build quality and performance. It was easy to use, quickly delivered a textbook-perfect crosshatch, and required no special skills or setup. It’s a bit of an investment, but the time and effort saved make it worthwhile for any rebuild project."

"This hone did a fantastic job on my 6.7 Cummins bore, and I appreciated that it was the exact size and grit needed. Delivery was fast, and I found the tool to be flexible enough for slight variances in bore size. Definitely money well spent for its intended application."

"I’ve relied on this brand for over two decades, and I can say these are the best hones available if you use them as directed. Consistently great results every time."

"I've owned a Rossi revolver for over 30 years, and the rough chambers always made ejection tough. After using this hone, the empties pop out much smoother now, even though the finish isn't a perfect mirror. This improvement means I'll probably use the revolver more often."

"My .22 LR barrel used to jam constantly, with spent brass getting stuck and visible scratches on the casings. After trying new extractors and other fixes, I finally tried this product. Following the instructions, I polished the chamber, and now the barrel ejects perfectly—my new barrel is finally usable!"

"While the product quality is high, the shaft is much shorter than I expected, and it doesn't fit my rifle since it's designed for handguns or revolvers. Double-check the shaft length before purchasing if you need it for a rifle."

"I was considering spending a fortune on new rotors for my R1100S, but after using this tool, the pulsing was completely gone and my rotors look almost new. It took a couple of hours, but given the results and how much money I saved, it was well worth it."

"After using this hone on the brakes of my 2004 Honda Goldwing, the rotors were deglazed and the brakes now perform like new. I simply let the engine spin the rear rotor while I worked and had no squeaking once I finished."

"This tool handled my 20-year-old F350 rotors with ease. The process was straightforward, and after a quick deglazing, my brakes improved noticeably. Once I install new pads, I expect they'll feel even better."