'mirror' part not exactly high grade 'lens' material, but for a budget purpose does the job...  seems to screw into place securely and is the right size and seems solid enough. WE always have more than one person in the boat if we're towing someone, so this was more to be legal in case we ever wanted to have just driver and person being towed...  and for the driver to be able to peak on their own without relying on the other passenger.  SO, this fits our needs well enough in spite of the lack of crisp visual.  It's ok to good, not good to great.