By eliminating the outside clamp, the Lock-On system is ideal for riders who prefer to ride on the outside edge of their grips Also ideal for riders who prefer to run rubber ends as opposed to end plugs The heavy-duty clamp on the inside of the clutch is strong enough to hold your grip in place without any twisting or slipping On the throttle side, choose the applicable 2- or 4-stroke throttle cam, snap into place and replace as you would your throttle tube and you are ready to ride Revolutionary system survives the most severe weather Installation and removal is easy and will not destroy your grips Core plastic has a punch-out skeleton system to allow for the installation of handguards Necessary cams are included with each set of grips Made in the U.S.A.. GRIP LOCK-ON MUD 7/8"