The RAM Grab Handle Bolt Adapter Base is the ideal base for installing RAM Mounts on a Toyota Tundra's grab handle using a M6 threaded bolt. With a hollow center, you are able to feed the 6mm bolt or smaller to screw into your vehicle's grab handle for a stable mounting base with no drilling required. Keep your windshield clean, and your phone mount out of the way with this grab handle mount for phones, GPS devices, GoPro cameras, and more! While the Toyota Tundra is the only vehicle with confirmed compatibility, any vehicle which employs a 6mm bolt or smaller on its structure is compatible with this product. A smaller bolt can be used, though the load capacity decreases with the bolt size.