Rest assured, we’ve got your back. The BlueRev Petit Grip Mirror has adjustable viewing angles to ensure you can see everything happening behind you. The blue tinted lens helps protect your eyes by cutting down the glare. The mirror fits into the end of standard bike handlebars with diameters from 14.8mm to 23mm.  Quick and easy installation – insert the mirror into the end of your handlebar and tighten with a few turns of a 5mm hex key.