I got tired of having antenna mounts break or crack, so I built a few of these for myself and felt it would be a good thing to offer them to other Hams. They are $10 each with $5 shipping, if you want more then one, then it's an added $1 per mount. I wish I could get a lower shipping, but these will go out 1st class USPS mail. My QSL card has all my contact information on it, so post here, or email me if you're interested . Specs: Stainless Steel 304 11 Gage Mount hole is 5/8" so they will fit a SO239 Mount holes are 5/16" Tie down holes are also 5/16" I added the tie down holes to the mount to allow for bungy cords to be attached to the mounts for use to attach a tarp or anything else you'd like to use the mount for.