haa0012 's Japan Review

I am clumsy with my hands, so this tool is helpful.
I have also found the O-ring to be properly effective.
When using metal shafts, they often came loose and I had to re-tighten the screws every time I pulled them out of the board, but after installing the O-rings, I no longer have to worry about that and they are less likely to come loose.
By the way, the plastic shaft does not loosen so much, so it is not a problem, but I still felt that the O-ring makes it even more difficult to loosen.

We are nervous people and O-rings are very useful.
Even nylon shafts work well.
Of all the included instruments, this HARROWS metal one is the easiest to use.
Recommendation.

It is essential to fit the o-rings to prevent loosening.
Easy to fit

This is an O-ring to prevent the shaft from loosening.
This prevents the shaft from loosening, allowing you to concentrate on your play without stress.

This is a must have for me as I use metal shafts. Without it, metal shafts loosen quickly and I can't concentrate on my game...not to say that I can't concentrate on my game, but it is a hassle to re-tighten it every time. It can also be used for nylon shafts, so if you are worried about loosening, why not try it?

I would like to have this item because it seems to prevent the shaft from loosening and I am very concerned about it clattering after I get into my stance.

This tool is very useful when fitting O-rings to loosen aluminum shafts, etc.

I use aluminum shafts and this product is a necessity.
Without it, the shaft would be loose and stressful, but by putting it on, the looseness is reduced to almost nothing. Plus, there are so many rings that if I lose or break one, I can replace it right away, thank goodness!
Also, the included metal parts allow for smooth attachment to the shaft, so I think it would be convenient to carry the rings in a small ziplock or similar container to make it less bulky and easier to use!

I bought this because I was feeling that my carbon shafts were loosening easily. I should have tried this earlier, the loosening is almost non-existent and not bothering me at all.

Smooth installation and removal of O-rings eliminates stress.