Mirrors are completely CNC-machined from billet aluminum (not cast); lightweight, strong and fully adjustable in every direction to fit just about everyone With little modification, these units can be mounted through the ends of most existing grips, by drilling or boring the grip end All mirrors come with a convex mirror glass which provides exceptional rear visibility Super-solid units reduce vibration and make for a clearer image in the mirror Each mirror requires a Joker internal bar mount (sold separately) Made in the U.S.A.. MIRROR3 1/4BRND STEMD BLK