I ordered this mirror for a boat because I read CIPA's Revain "Answer" product which said it was rated up to 1 for "Rail". 1/4 inch would fit. It doesn't even fit in my 1 inch boat windshield frame. If you loosen the screw it will fall apart before it fits in the 1 inch frame. Instead of wasting the (almost) $7 they want back, I'm going to try and get some longer screws and see if it fits in. Let it open just enough to be useful.
Upgrade Your View With LITTLEMOLE Rear View Mirror - Wide Angle, Ultra-High Reflection, Universal Clip On
15 Review
BL Super Wide Angle Rear View Mirror - Universal Car Interior Mirror For Trucks, SUVs, And More - 300Mm X 85Mm X 33Mm - Curved Design - Pack Of 1
32 Review
Enhance Your Car with the Custom Accessories 53331 Black Visor Vanity Mirror
10 Review
Roadgid Blick GPS Wi-Fi Mirror DVR with Second Camera, External GPS and Superb Night Vision
29 Review
Tsumbay Car Backseat Organizer - PU Leather With Tablet Holder, Foldable Table Tray, And 9 Storage Pockets
33 Review
Simplify Your Car Organization With Sposuit'S Collapsible Trunk Organizer - 11 Pockets & Reinforced Handles For Easy Grocery And Cargo Storage! (Grey)
27 Review
Transponder "T-Pass" TRP-4010 AVTODOR TOLL ROADS, black
46 Review
3-Compartment Cargo Trunk Storage Organizer By EPAuto: Maximize Your Car'S Storage Space
28 Review