12mm. vary hard to find 3/8 or longer screw tunnels. I guess standard is 1/4.1yr â‹… jschilkowski â‹… r/Stretched
7/16 tunnels,on the fence to go to 1/2 in. Been there before but didn’t stay for long.1yr ⋅ jschilkowski ⋅ r/Stretched
Added 00 gauge barbells through the 7/16 tunnels the weight is definitely a turn on1yr â‹… jschilkowski â‹… r/Stretched