I BOUGHT THIS STRONG BIG MAGNET TO USE WITH FIBER GLASS CB ANTENNA. ITS REALLY STRONG TO. ONCE YOU SET IT TO ANY METAL ITS STICKS BIG TIME AND IT HARD TO TAKE BACK OFF WITH HANDS. AND THE FIBER GLASS ANTENNA HOOKED UP PERFECTLY. SO I WENT TO TUNE IT WITH SWR METER I WAS SO SHOCKED!!!!!!!!! DIDNT NEED TO TUNE IT WAS ABOUT A 1.9 ALL CHANNELS WOW I WAS GLAD REALLY HAVENT HAD TO TRIM A FIBER GLASS ANTENNA SO I WAS GLAD THIS ON WAS SO WELL TUNED.I LIKE THIS MAGNET MOUNT SO MUCH I BOUGHT ANOTHER, GREAT CUSTOMER SERVICE THEY PUT THE WOW FACTOR IN CUSTOMER SERVICE. THE SECOND ONE CAME BUY THE UNITED STATES POST OFFICE DESTROYED THE PACKAGE. I MEAN IT CAME ALL RIPPED UP THE END WHERE THE L259 CONNECTOR WAS HANGING OUT OF PACKAGE AND THE MAGNET WAS SUPPOSE TO BE IN THE BOX WELL BOX WAS ALL TORN A PART. CONTACTED THE SELLER AND WHAT THEY TOLD ME WAS EXCELLENT. I HAVENT HOOKED THIS ONE UP YET BUT WILL UPDATE IF THE MAGNET MOUNT DOESNT WORK. I COULD PLAINLY SEE THAT THIS ISNT THE SELLERS FAULT, BUT WANTED THEM TO KNOW WHAT HAPPENED IN CASE MOUNT DOESNT WORK. CUSTOMER SERVICE SAID THEY WOULD TAKE CARE OF THIS IF IT DOESNT WORK. NO CHARGE TO ME ON ANYTHING. THANK YOU.WILL RECOMMEND TO FRIENDS.