Product DescriptionThe mirrors are more effective for avoiding blind spots than the ones that stick to the side view mirrors, and it holds its position tightly.1. It solves dead angle zone of sight perfectly .2. Safe parking multi-purpose auxiliary rearview mirror.3. You can adjust the side stop line accurately.4. You can adjust the angle of reflection freely.5. Suitable for installation on rearview mirrors and side mirrors.6. product size: Small approximately 4.33*2.16*1.18 inches(11*5.5*5cm).Large approximately 5.7*2.6*1.18 inches(14.5*6.5*5cm).How to Use It:(1) Insert the metal disc into positionThe first step is most important: please make sure the exact position.And, paste this metal shim on the rearview mirror.This metal shim is protective the surface of your rearview mirror not be hurted(2) Fix the screws to the metal washerUse the screwdriver to install the screws on the metal shim. note: on the metal gasket.(3) Adjust the perfect angleAfter installed the crews, you can adjust a perfect angle of your blind spot rearview mirrors.Do not use it with other usage than its function.Please confirm that your wing mirrors' thickness not exceed 0.47 inches before buying .Two metal pads to protect the bodywork, You can install it safely.he bodywork, You can install it safely.Wider vision, perfect dead angle areas and help you drive safely