The cutting edge is solid and biting is good, the grip is easy to enter power and the hand does not hurt, so I used the same things all the time. As expected after 20 years (private) if you are getting bad it is replacing it.
The shaft diameter is a little thinner than the size # 2 of another company, it is 6.0 mm, which is compact overall, so it is a big mistake if you think that it failed. I felt better at the tip than the PB of three times the price. I am addicting if I become accustomed to the unique grip shape, so it is up to now that I wanted to arrange the drivers at TONE.