The Knuckleduster features a tapered internal sleeve that you have to tap onto your handlebar for full engagement. This tapered sleeve feels like it is already locked into place once fully tapped onto the bar and coupled with a single bolt lock-on clamp, you will not develop any play. The body of the grip combines the best elements of a half-waffle, mushroom ribbing, and an ergo feel. Featuring a mushroom pattern to minimize vibration. The Knuckleduster grips are an all day grip that allow you to keep it Pinned Wide Open at all times.