This mount is compatible with the RAM 1" ball mount. It has a drill down base. The mount is 5 1/4" high

With the inclusion of the deluxe multi device holder you can mount any amateur radio ht, scanner, speaker mic or remote radio head. In some cases you will need to purchase the manufacturers remote kit to get their remote head bracket. If the manufacturer offers this, you will need it to attach it this mounting solution. The LM-EXT-01-Deluxe multi device package includes a EXT-01 6" X 2" anodized aluminum plate with multiple 4 hole amps pattern holes. It also comes with a pre-drilled hole for a 5mm screw, which is included in the kit. This size of screw is used to attach the Yaesu FTM series of radios. The bracket also has a 1/4 X 20 predrilled hole and the screw. This is used for Icom remote heads like the IC-7100 and remote head brackets for the IC-706 and IC-7000. Please note you will need the optional Icom remote head brackets for the IC-706 and IC-7000. They can be purchased from any Icom dealer. We also include 2 LM-1203 HT / Speaker mic holder and the bracket to attach them to the EXT-01. A metal mic clip and an Icom hook and 2 EXP-4's for HT's and speaker microphones that have belt clips or button type mounts.