The Auto Drive 3-3/4 Round Truck and RV Blind Spot Mirror is a must-have accessory for all drivers concerned about safety while they travel. Designed to help you change lanes with more confidence this specialized mirror is a convenient and reliable way to increase your view on both busy highways and quiet side streets. By eliminating dangerous blind spots it provides you and your passengers with a safer ride. Engineered for 360° rotation it delivers an optimal viewing angle while driving this round mirror supplement is ideal for creating a greater field of vision in larger vehicles such as trucks and RVs. It can also reduce strain on your neck when turning to check traffic alongside and behind you. A self-adhesive mount makes it simple to install on your existing side mirrors. Investing in the Auto Drive 3-3/4 Round Truck and RV Blind Spot Mirror is a small but effective step toward ensuring your safety and the safety of others on the road. .15 lb.