What does it mean to have a core cutout?
Lock-on grips typically feature a solid core that locks onto the bar and secures a softer, external treaded compound(grip) to the bar. Core cutouts are areas where the internal solid core has been cut away, creating a relief zone and providing additional room for more of the softer, treaded compound material between you and the handlebar. This helps create a softer feel with better vibration damping.