Brush Research FLEX-HONE Cylinder Hone, GB Series, Silicon Carbide Abrasive, 4-1/8 (105 mm) Diameter, 240 Grit Size

Cleaned surface rust from unprotected cylinders and made them look new. Very happy with results and quality.

Worked wonders!!

Just used it on one aircraft cylinder, but it did an amazing job. Other mechanics in the shop were equally amazed. The cylinder broke in very well.

Does an excellent job honing cylinder walls. Makes it easy to get a perfect cross thatched finish. For this price it is a very good tool.

This seems to be a well made tool. The abrasive tip is connected to the metal center with plastic leaders but they seem to be sturdy enough to handle the work. If you are reading this you know what it is for and it seems to fit the bill quite well. Keep in mind when purchasing that you will want to make sure you get the size and grit needed for your application.

Works as it should, does the job. Its not perfect lol, its a dingle hone, so dont expect machine level results. But if youve got a thin bit of surface rust, or youre just a cheap slop like myself who needed to hone the cylinders in my junky rally car. Its great.

Works excellent may seem to big or tight but its supposed be that this is for a 3in cylinder bore

Works great. Produces a very good finish without cutting. Great tool if your cylinders are in good shape. I had to use a 3 stone hone to cut a little out of my cylinders and used this tool to get a good final finish after cutting. A+

This flex hone worked well for aircraft cylinder engine cylinder finish, and honing out some scratches and score marks. Well packaged and appeared to be well made.

Rebuilt a Jeep Grand Cherokee 4.0L (straight six) without removing the engine from the vehicle, and the Flex-Hone worked great for me. Did a lot of homework before using, to understand exactly what the procedure was and that I had the necessary drill, clearance, fluids, posture, RPM, and honing technique. I had to mod the hone to weld a hex bit to the shaft (making it as short as possible from drill back to hone-front for the mounted engine), but managed to get the job done. I would not have been able to use any other traditional honing tool in the space, and it was very forgiving for the angles I was working with.