Hagerty Radio Company
The Ladder-Loc® is the BEST strain-relief and mounting support for 450-ohm ladder-line on the market. This is MY opinion not only because I sell them, my repeat customers love them, but, I have used them for years with NO failures in my own antenna systems.
It is UV-stabilized and has a proven field record of durability.
Over 10,000 have been shipped to satisfied users.