This grip features an ergonomic design that follows the contours of you hands, to help eliminate many of the problems associated with conventional grips. A dual compound design creates a grip which is soft on the hands, yet maintains maximum grip.
They do not lock on and will rotate easily, but are nice an comfortable once you get them adjusted.
For the price they are good if you need new grips. I put them on a bike I was selling so I could keep my other grips.