A flat sleeve of rubber would have been better as the rings become rather painful on your fingers if you have to use the driver for extended periods

I did read that some people had issues with the rubber grip on the handle spinning ( black rubber O-ring around tip, used to grip)

The o-rings also seem like they'll break in no time

My only complaint is the awful grip rings

Other than that, this is a great set (and they do fit on my boxer set handle when the one with the kit finally loses the rubber rings).

The top ring for spinning the

The interconnects are not as solid as I as expected.