Efficient Velo Tools’ Heavy-Duty Bicycle Helmet Mirror Established. Proven. Credible. Wait, I thought EVT made tools? We designed our only accessory product as an industrial-grade tool that reliably provides mega information and greater awareness for cyclists. A huge 2 & 1/4" mirror provides the safest view of what's behind you VERY sturdy construction. Does not vibrate. Stays in Place! The linked arm is easy to adjust and holds the position 100% U.S.A. Made from high-quality materials Installation help and 5-year "No-Fault" warranty from the manufacturer. Guaranteed to fit nearly every helmet. Read the Safe Zone Story Stop overthinking this. You're looking at one that is 3.5x the cost of your last one - because the last one(s) didn't work. The thin wire ones vibrate. The mirrors are unclear. Small sizes require too much location of the mirror, then focusing and positioning, all while moving. Sound familiar? This one solves it all. Easily positions, no vibration, clear optical reflection, and the large size makes it intuitive. Glance left and you instantly can process the view behind you. No searching, focusing, thinking. You've seen it all.