The Mirrycle mounts in minutes with the wrench that is included. The mirror is a 3" round, convex glass mirror with a wide field of view. The mirror is adjustable to any viewing angle. - Fits inside handlebars with 13.75mm – 22.5mm (.54" to .875") inside diameter

- The original third-Eye eyeglass mirror design - Shatter-Proof aluminized glass mirror, Resists discoloration - Mounts to left or right sun/Eyeglass temple-Arm - Rubber-Tipped outer prongs provide a no-Slip mount

The Third Eye Foam Helmet Mirror allows you to see what's coming behind you so you can ride defensively and stay safe on the road. The shatter-proof glass mirror is distortion-free and highly durable. It attaches to the inner or outer rim of almost any helmet with a high-tech product called Dual-Lock.

- Shatter-Proof aluminized glass mirror, Resists discoloration - Mounts on either side of helmet offering a wide range of adjustment - Mirror and/Or arm can be detached from helmet mount - Adhesive backed plastic fan-Plate fits most helmets