Diamond makes the best door/trunk lip made. it is adjustable via allen screws so that it can be mounted horizontally on a trunk, or vertically on the side of a door (I have two on my Honda Element's rear doors) and is available in NMO, SO-239, and several other versions. As to getting the coax in, it ALSO comes with about 20 feet of RG-316 teflon coated coax; it's only about 1/16" thick, and the teflon coating makes it especially tuff and durable. Being so small, it is easily tucked into the door jamb guards, and through weather seal. The tiny SMA connector on the end comes with a SMA to PL259 adapter, but you could probably use an SMA to BNC for a mobile scanner. The inside of the mount that comes into contact with the body of the vehicle has heavy rubber pads, and a plate that the allen screws tighten. I've taken mine off several times for maintenance, and there is NO scratching/marking on the area where it is mounted. Its model K-400 by Diamond. Pricey (about 75 bucks) but well worth it.