Brush Research GBD40024 FLEX-HONE, 4 (101mm) Diameter, 240 Grit, Silicon Carbide Abrasive (Pack of 1)

Hubby says this is a great tool in his engine rebuild.

Good tool for my VW 1600 rebuild! Took practice on an old detonated cylinder to get cross hatch just right. Practice first and use oil! Itll do the job quick and well.

Excellent item for the price.

Great price and worked better than stone style honing tool.

Worked like a charm on my CJ5 with an AMC 401, look up on U tube for how to use it was very easy, and this hone is well made, my bore size is 4.195 hope this helps.

Technique for a ball hone is easily found online but it would have been reassuring to have the instructions directly from manufacturer. It worked as I expected and should last a long time.

I used these per ring manufacturer recommendation for grit. Worked perfect. Easy to use.

awesome---cleaned up a 7 inch bore cylinder 10 feet long and shows little wear---highly recommend

I used this hone on a BMW M20 rebuild out of a mid-80s E30. The hone worked perfectly. I first used the hone with an old 9.6V Makita cordless drill that, sadly, didnt make enough torque to get the job done right. I went out and bought a 6.5 amp Porter Cable 1/2 chuck drill and it cleaned up the cylinders perfectly. Note: if the hone starts to bind a bit, do your best to _not_ stop the drill from spinning. I learned (the hard way) that if the hone stops, and you (in your infinite wisdom, like myself) try to reverse the hone out, the metal braids that hold the hone balls in place will unravel. Youll spend more time than you car too putting the hone back together again (with or without all the kings men). Even though there is still life in the first hone I used, I ordered another one just to have on hand. Thats how much I liked this hone.

Nice brush home all arrived in tact and ready to use