I was inspired by some BDSM manga to make this cock sleeve.
The two leather bands go over the penis, held together with leather straps riveted in place. The two leather bands have rings of metal spikes attached to them, two rows for the top band, and three rows for the bottom band.
Shown below modelled on the Crystal Cock I made, the sleeve is custom made to fit the wearer and can be worn as it is or with a tie ring around the scrotum.
While it is a nice sleeve and piece of leather, I wouldn't recommend anyone actually using it, it could cause irreversible damage.