These Federal Signal mounting clamps are a real lifesaver when it comes to selling your car, because you never have to make a hole in your roof at all! It makes the job easier, and saves time.
A definite buy when perchasing a lightbar, just make sure you select the right kind, or another that will fit your car/ truck properly.
Also, make sure it is very tight, you might have to use washers. Visit my snow plow web site at: http://members.nbci.com/blaine10/page3.html