These barbells have slightly domed disc ends. Only one end is internally threaded, the other is not removable.
Date posted: 1/31/2013
I think I prefer this over the delrin bar, it feels smoother. The length was perfect since I knew my tongue would swell up.
Date posted: 10/30/2012
I believe these are just a smidge larger than 0 gauge. Mine was filled with teflon "shavings" when I removed the end, and I needed to rinse it out before wearing. The end screws and unscrews easily but stays put when it should.
Date posted: 9/18/2012
Cleanly machined. Slightly oversize per gauge standards. Threads are snug enough so no unscrewing problem noted so far. Comfortable to wear.