Excellent product for cutting a .75" diameter hole in surfaces where a clean cut is important. For example if you are most into ham radio and want to take your car to the "next level" and want to permanently install this antenna. If you like it, then you better put an NMO on it. It's just the right size, but not worth the ridiculous amount of similar hole saws that are "made specifically for mounting an antenna". a clean edge that you can otherwise ruin by drilling a support post or pinching the working end of a pair of needle nose pliers because you didn't buy that fancy NMO tool either. I didn't use with impact and used a regular drill bit instead.