This Billet Aluminum kit is used to mount the CRG Hindsight, Hindsight LS and Blindsight Billet Bar End Mirrors for various applications. This assembly offers an alternative to the basic Bar End Mirror mount* for those with wider shoulders or when a mounting location is not available for your mirror. This assembly will work on bars with internal diameters as small as 12mm (.475”) and as large as 19mm (.750”). This range covers virtually all hollow aluminum and steel bars/clip-ons. Once installed, this adapter provides an ideal location for the basic mount of your CRG mirror. * Whenever possible we recommend mounting the Hindsight Billet Bar End Mirror with the basic mount which clamps to the outer diameter of a 7/8” handlebar/clip-on. Use of the basic mount requires having 10mm (3/8”) of bare bar outboard of the grip/throttle assembly. In many applications, the mirror can be mounted with the basic mount, without the use of this Kit! • 6061-T6 Aluminum CNC Machined Billet Construction • Black Anodized • Application Range: Min. Bar I.D. 12mm (.475”)—Max. Bar I.D. 19mm (.750”)