The Laird VTPM800 vehicle roof mount antenna installation hardware kit is a special application NMO mount for Motorola-style mobile antennas, 0 – 1000 MHz in thick surfaces. This permanent mount is for a 5/8 in hole in mounting surfaces up to 3/8 in thick. Typical applications include low band, UHF, and VHF antennas.brbrThe Laird Technologies mobile antenna mount has an N Female connector. Order cable separately. Thread size is 1 1/8 in-18.