Here you can see The Vice™ Chastity Cage durability test; the welding of the two halves of the cock cage withstands up to 20 psi (1034 mm Hg), which is 8.6 times more pressure than a normal erection which is only 120 mm Hg (2.3 psi). This is due to the cage being sonically welded together, which provides a stronger hold than commonly used glue.