PREMIUM MATERIAL - Made of strong stainless steel and strong magnetic base, there is a very strong magnet between your car and the LED light bar, this LED roof rack can emergency brake at 100km/h without dropping, not too strong. STURDY BRACKET - You can securely attach and mount these magnetic base mounting brackets for your LED lights, and there is another magnetic slot available. Anti-corrosion magnetic surface and screws keep the bracket well protected for a sophisticated look. 360 Degree Rotation - These magnetic top light bar base brackets can be rotated 360 degrees to adjust the height and the angle for a perfect fit, you can mount your work light or LED light bar at any height you want. APPLICATIONS - Compatible with most LED modules and LED light bars ( *Less than 20 inches, not suitable for LED light bars over 20 inches), suitable for most types of cars, trucks, SUVs, ATVs, UTVs, RZRs, etc. The package includes 2 magnetic base mounting brackets.