Harv, TomG has already answered. There are several brands of course. You can buy a "kit" that includes a punch for inserting into the puncture to clean any debris out and a tool to insert the plug. And they're only good for tubeless tires (in my case front tires only). I've never tried, or known anyone who's tried, using them in a liquid filled tubeless tire, so I can't really say whether it would work or not, but have some doubts. The plugs have been around almost, but not quite, as long as tubeless tires and I know folks in the tire business who think the modern ones are better than patching a tire on the inside. Some of the early ones (40 years or so ago) had a tendency to blow out and/or leak, I've always preferred a patch on the inside on my cars and pickups, but I think you'll find most tire dealers use the plugs instead now-a-days and only patch the inside if the customer requests it, so I put my first plug ever in one of my pickup tires last year and it's still there with no leaks. In 4 years, I had to put two plugs in one of my riding mower tires with no problems, and as mentioned, I plugged my tractor tire last week without taking it off the tractor, removing the valve core, etc. so it's quick and easy.
Thomas, I'm not sure what the thron apple (or is it thorn apple?) is, but mesquite is a common bush or tree in this part of the country that is hard to get rid of, and the thorns (up to 2-3") are supposedly the reason the old cowboys invented the leather chaps to protect their legs. I stepped on one about 4 years ago that stuck right through the bottom of my sneaker; ouch! As far as I know, no one has found a good use for mesquite wood except for barbecuing (sweeter than hickory). And it burns hotter than most wood; not too good for fireplaces. I cooked the mortar out from between the bricks on my first fireplace and had to rebuild it.
Bird
