The mirror and the arm are out of the same mold as the Eye Glass mirror (1 1/8 inch shatterproof glass mirror with an aluminized reflective backing). The mirror attaches to the rim of any type helmet. The Duel-Lock (like Velcro but much better) is attached to the rim of the helmet and the Duel-Lock on the mirror snaps on to it. The new attachment is a great improvement compared to Velcro (no vibration!).