I need to get a picture of my medina, before it completely rots down. It has a fairly ingenious (I didn't make it) really large and long bolt on it. The bolt is completely threaded. Really big deep thread. Maybe 5 threads per inch. Not sure what it's off of. It has a nut on the bolt, with dog ears welded on it. You turn the nut with your hands, and it tightens the gate in on the cow. You can get a cow pinched up in it pretty good. Little aggravating to ear tag in it, or drench, but everything else ain't much trouble.