Also a suggestion for a mobile on for my truck that I don’t have to drill holes for,as u can tell I’m just getting started in this
For 800MHz only, an on glass antenna might be a good option.
http://www.theantennafarm.com/catalog/larsen-kg3e825ud-3247.html
The issue with not wanting to drill holes is that you then need to figure out how to get the cable in to your radio. Often people are tempted to run it through windows or doors. That works fine for a while, but the cable gets damaged. It can get pinched, which will physically damage the cable and can impact performance. If the outer jacket gets breached, then you get water inside the cable which will cause corrosion and destroy the cable.
If a magnetic mount is what you decide on, make sure you figure out how to get the cable inside. As for the antenna, the same one I suggested for your home. It'll work well on VHF, UHF and 800MHz. It'll give you the most flexibility.
You'll need a magnetic mount for it:
http://www.theantennafarm.com/catalog/larsen-nmommrbnc-4522.html
Some choose to mount the antenna on the fender. That's OK, but it creates a number of issues…
1. You still need to get the cable inside the vehicle. That can be done, but it takes some work under the hood. You have to find a path through the firewall. Some trucks it's easy. Some it's not.
2. Cable can still get pinched by the hood.
3. The antenna mounts are not designed to be mounted with the cable entry outside the vehicle, so you have to take steps to seal it up. If you don't, rain, road salts, oil, etc will damage the cable and destroy it.
There are vehicle specific fender mounts that you can find.
But, a basic on is this:
http://www.theantennafarm.com/catalog/larsen-tmb34-3847.html
And then you need the mount/cable. In this case, all the antennas I've suggested (except the through-glass mount) are the industry standard "NMO" type. Using this type of mount will give you the most flexibility and give you a very wide selection of antennas.
http://www.theantennafarm.com/catalog/larsen-nmokhfudbni-7566.html
It's very important that you seal the underside of that mount where it's exposed!
There are other mounting options, but it depends on your vehicle, what your skill level is, etc.