Hypoallergenic rose gold PVD coated titanium hinged segment rings in 1mm and 1.2mm gauge (thickness) with 6mm, 8mm, 10mm and 12mm internal diameters. Hinged segment rings close the same way as standard segment rings but with one end hinged to the ring they aren't quite as fiddly as you only need to click one end into place. Often the segment does need to be guided into place. Holding the segment between your thumb and index finger and the ring part with your other hand is usually the easiest way to do this. Don't worry if it goes passed the ring instead of clicking in, it will go back into the right place without doing any harm. From customer feedback the 12mm rings are the most difficult and you may find the 6mm, 8mm or 10mm easier to close if you aren't familiar with segment rings. Rose gold PVD coated titanium looks like rose gold in colour only. If you are allergic to rose gold it is a great alternative.