HD&MORE SAFETY -Bike mirrors for handlebars with convex mirror designs for a more wide field vision,which provides you HD visuals of the road conditions behind you to help keep you safe from road accidents.The mirrors can be mounted on electric bike,city bike,mountain bike etc. BLAST-RESISTANT & 360 ADJUSTABLE - The handlebar mirror for bike made of premium resin material featured with blast-resistant.The bike rearview mirror can be rotated 360 so that could be adjusted any direction to help you watch every direction of your back.Bike mirrors handlebar rearview mirror is a game changer for riding. HIGH QUALITY&DURABLE - Bike rear view mirror at bar end is made of high quality ABS plastic,sturdy and durable.Whats more,the nylon resin material can protect the bike mirror from cracking. WELL MOUNTED IN MINUTES - Only needs 3 steps to install this bicycle mirror:1.Insert the expansion plug frame into the handlebar hole;2.Using the hex wrench in the package to tighten, and adjust mirrors to desired position;3.Remove the protective film on bike mirror ensures clear view on the road. SUITABLE FOR-Our bicycle mirrors for handlebars fit flat & drop bars with an inner diameter of 0.71-0.86 inch(18-22mm) at the bar end.So please measure your bike handlebar aperture in advance before purchasing.