Bored and made a flow through penis plug

[fuelhead]

I am new to urethra stretching and plugs. I have 2 cum through plugs from The Chain Gang and like them a lot. I like to make things myself and was thinking about stainless steel bolts as a threaded plug . The following pictures are what I came up with. The diameter of 2 of them is 8mm and the third is USC 5/16”. I have to graduate to the larger one. I polished them to take the edge off the threads and then cleaned them properly for inserting. The only downside was my drill press is old and the hole isn’t centered on 2 of them . Oh well.