This 4 way tilt-base RA135 is meant for the direct mounting of antennas within the GLOMEASY-series (RA300) with 5/8"-24 thread types.Our practical tip:Run the RG8X cable from below (cable outlet) through the tilt foot and then mount it on the antenna. This is easy, since the FME connector follows the bore's path.If you want to pull the cable with the FME connector from above, through the tilt foot, you run the risk that the FME connector will bend under the cable outlet, leading to possible cable/terminal damage. Note: The combination of RA300 antennas and GRP-antenna extensions RA301 don't fit on to the tilt-base. The GLOMEX tilt-base RA107SSFME is also available on request to solve this compatibility issue.